
The best manual knife sharpener for most kitchens is a hand-held carbide unit or a guided angle system, not a whetstone. A carbide hand-held model restores a usable edge in seconds with zero technique, while a guided system lets you set an exact bevel angle and repeat it knife after knife. Stones produce the finest edge, but only after real practice.
That is the short version. The longer version is that a manual knife sharpener is any hand-powered tool that restores a cutting edge by drawing the blade across an abrasive harder than the knife steel. Pull-through slots, fixed-angle guides, rolling sharpeners, whetstones and honing rods all fall into that family, and they are not interchangeable.
We spent weeks putting ten of the best-selling manual sharpeners through the same routine. Every unit sharpened the same set of blades: a German chef’s knife, a santoku, a 6 inch paring knife and a serrated bread knife. We scored angle control, how much steel each method removed, how the edge behaved on a tomato and a sheet of paper, and whether the tool could physically handle the blade in front of it. Last updated for 2026.
If your sharpening needs extend past the kitchen, our guides to the best knife sharpeners for hunters and the best hunting knives cover the outdoor end of the category.
| Model | Key Specs | Action |
|---|---|---|
AccuSharp Carbide Hand-Held Sharpener |
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Work Sharp Precision Adjust Kit |
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Sharp Pebble 1000/6000 Whetstone |
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KitchenIQ Edge Grip 2-Stage |
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Chef’sChoice 2-Stage Diamond Sharpener |
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King KW65 Combination Whetstone |
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Intelitopia Complete Sharpening Set |
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Wucgea 8-in-1 Whetstone Kit |
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KEENBEST 400/1000 Water Stone |
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Wusthof 2-Stage Hand-Held Sharpener |
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Diamond-honed tungsten carbide blades
Reversible for double life
Handles straight and serrated knives
The AccuSharp is the sharpener I hand to people who tell me they will never learn whetstone technique. Draw the blade through the slot a handful of times and the edge comes back. That speed is the whole product: no angle to judge, no stone to soak, no clean-up beyond a rinse under the tap.
It ranks first in its category on Amazon with a 4.7 average across more than 28,000 reviews, and that consistency matters more than any spec on the box. Owners report 5 to 10 years between blade replacements because the tungsten carbide cartridges can be flipped and used a second time.
At roughly 1.6 ounces and 9 inches long, it is the only unit in this test I could keep in a knife drawer and use standing at the sink. That single design decision removes the setup step that kills most sharpening habits.
The slot is lined with two crossed rows of notched tungsten carbide. The blade passes between them, and the notches scrape metal away faster than a ceramic or stone surface. You are sharpening, not honing, and that distinction matters for how often you reach for the tool.
Honing straightens a rolled edge back into line without removing much steel. Sharpening grinds a fresh edge. This unit does the second job, which is why it should live in the drawer as a rescue tool rather than something you run over every knife after every meal.
The fixed slot angle suits a standard Western bevel, which is what most German and Japanese-style chef’s knives in an average home kitchen carry. Pull it out on a shallow Asian edge and it will grind away noticeably more steel than you intended, because the tool cannot adjust to a narrower geometry.
If your block is full of 15 degree gyuto or yanagiba blades, this is not the tool. Look at the adjustable angle systems further down this list instead, where the bevel is a dial rather than a fixed slot.
The last half inch near the bolster and the tip region are hard to work in a hand-held slot, and reviewers describe a slightly rougher transition there. On a serrated blade, the slot does an acceptable job on the larger teeth, but the fine serrations are left largely as they were.
Nobody should expect a serrated bread knife to come out of a pull-through slot looking factory fresh. Plan on a tapered ceramic rod for that, and use the slot for your straight-edged knives where it performs best.
Skip it if you own a block of single-bevel Japanese knives, or if edge geometry is something you care about enough to measure. Skip it if you want a polished, mirror-style edge, because no pull-through slot produces one. It remains the right call for a mixed household of standard knives used hard and sharpened rarely.
Angle guide adjustable 15-30 degrees
Tri-brasive rod with diamond and ceramic
V-block and clamp
The Work Sharp is the most interesting object in this test. Where a pull-through hides the angle inside a slot, this one puts the angle on a dial you can read. Set 15 degrees for a Japanese blade, 20 for a German one, clamp the knife in the V-block and pull the rod through. The next knife can be set to the same number.
That repeatability is the reason enthusiasts on knife forums keep coming back to guided systems. A 4.5 average across more than 11,500 reviews reflects owners who value setting an exact bevel over developing freehand feel.

At 6.5 by 9.6 inches and 215 grams, this is the one pick here that claims counter space permanently. The benchtop base exists so the chassis does not slide while you draw the rod, and that stability is exactly what keeps the angle honest.
Most home knives fall between 15 and 20 degrees per side. Below 15 you get an extremely fine, fragile edge that dulls in a single session. Above 25 the blade feels noticeably heavier in the hand and the edge will not glide through tissue the way a thinner one does.
Setting the chassis correctly means matching the angle the knife already carries, not imposing a new one. A knife sharpened at 20 degrees and then reground at 15 will show a visible step where the two bevels meet, and that step is the secondary bevel that catches food.
The tri-brasive rod combines 320 and 600 grit diamond on one end with fine ceramic on the other. Coarse diamond sets the bevel quickly, fine diamond refines it, and ceramic removes the burr and polishes the apex. One rod means no swapping tools mid-session.
On hardened Japanese steel the coarse end did noticeably more work than a stone of the same nominal grit, because diamond is a harder abrasive than corundum. On a Western knife, the ceramic end alone was enough for a routine touch-up.

The V-block and clamp hold the blade by the spine, which means both hands stay away from the cutting edge during the stroke. On a thin blade this is the difference between sharpening and a visit to emergency care. The clamp also keeps a thin Asian blade from flexing into the rod.
It also limits what fits. Very thick cleaver spines and single-bevel blades that must sit flat against a reference surface will not seat properly in the V-block, and reviewers note the clamp needs loosening for a thick spine.
Skip it if counter space is tight or you sharpen one knife a year. It is also overkill if your only sharpening job is a serrated bread knife. But for a household with several knives at different angles, it is the pick I recommend without hesitation.
1000 grit and 6000 grit sides
Included plastic angle guide
Bamboo base, water-based
A whetstone is where the best kitchen edges come from, and it is also where most beginners give up. The Sharp Pebble solves the beginner problem in a specific way: it includes a plastic angle guide that rests the spine against a fixed stop, so the blade arrives at the stone at the same angle every time.
It holds a 4.6 average across roughly 25,700 reviews and ranks first in honing stones. Reviewers repeatedly credit the guide with making stone sharpening accessible while warning that technique still takes practice.

At 7.25 by 2.25 inches and 2.1 pounds, it is heavier than most kitchen gear and stays put on the counter, which is what you want while you learn. The bamboo base is the non-slip element; the stone itself is corundum and takes water rather than oil.
Two stones would be a bigger learning curve and a bigger outlay. The 1000 grit side is where the actual metal removal happens, forming the bevel and raising a burr along the edge. The 6000 grit side removes that burr and polishes the apex without much further material loss.
Those two stages are enough for a weekly maintenance routine. A fuller 400 to 8000 progression earns its keep when you are reprofiling a knife that has been neglected for a year or when you want a true mirror finish at the end.
The guide is a starting point, not an autopilot. It sets the height of the spine relative to the stone, but the stone surface must be flat and the guide must stay seated while you move. If the guide rocks or the stone has cupped, the angle drifts mid-stroke.
Forum advice leans hard toward stones for anyone who owns good Japanese steel, and Shapton comes up repeatedly on cooking forums as an affordable step up. The honest part of that advice is that a stone removes far less steel per session than any slot-based device, so the edge lasts longer.

Water-based stones need a 10 to 15 minute soak and should stay wet during use. That is the trade for zero oil, zero residue on your cutting board and no sticky film on the blade. The splash is real, though, and a towel under the stone saves your counter.
You will eventually want a flattening stone, because water stones hollow in the middle over time and a concave surface cannot produce a straight edge. The King and Intelitopia picks later in this list include one.
Skip it if sharpening feels like a chore you will not commit to, or if your knives are mostly serrated. A flat stone does almost nothing for serrations. It is also the wrong first purchase for someone who will not add a strop later, because a burr left at the apex feels unsatisfying even when the knife cuts well.
Carbide stage plus ceramic stage
Patented V edge grip
Non-slip base, compact body
With close to 98,000 reviews at a 4.4 average, the KitchenIQ Edge Grip is the most proven pull-through on the market by volume. It is the unit most people already own without knowing it, and for a standard Western kitchen knife it does the job adequately.
The design difference from a single-stage unit is the second stage. Carbide handles a dull blade, then ceramic slats refine and polish it. That second pass is what separates a two-stage tool from a scratcher with a handle.

At 1.75 by 1 by 3.75 inches and 14.2 grams, it is the smallest pick here. It sits flat on the counter, you draw the blade through a few times, and you put it back in the drawer. No soaking, no angle setting, no learning curve.
The patented V edge grip positions the blade so only the counter edge of the knife enters the slot. That keeps the tip from dragging down the abrasive, which on cheaper pull-throughs is where the tip of a good knife gets rounded off. On a thin paring knife, aligning the guard against the opening is the entire technique.
Both stages work on straight and serrated blades, though as with any slot device the fine serrations are barely touched. The ceramic stage is the one to use on an edge that is already working.
Reviewers report the ceramic stage wearing out in a couple of years, and the symptom is specific: the blade stops improving, no matter how many strokes you take. If a light pass leaves steel that feels scratchy rather than clean, the abrasive has polished flat.
That is also the cost question. Because a pull-through removes more steel per pass than a stone, running it out of sync with its fixed angle is what wears a blade down over a decade rather than a season. Treat it as a rescue tool and it is harmless. Treat it as a weekly habit and steel goes faster.

The base is non-slip but the tool is designed to be used resting on a countertop, with one hand on the handle and one on the knife. Reviewers warn against trying to hold it in the air, because the fixed base is what keeps the angle consistent. A tool that slides mid-stroke produces an uneven bevel.
Skip it if your knives run to 60 Rockwell or higher, or if you want an edge that holds for a week rather than a couple of days. It is a strong pick for a renter, a first kitchen and anyone who sharpens a knife maybe once a season.
Diamond abrasive throughout
15 and 20 degree angle guides
Sharpening plus honing stage
The Chef’sChoice answers a narrower question than the Work Sharp: which angle does this knife already have? Two guide positions, 15 and 20 degrees per side, cover the overwhelming majority of kitchen knives sold in the West, and the device uses diamond abrasive at every stage.
Diamond is a harder abrasive than the corundum in a traditional stone, so it removes material faster on hardened steel. That makes this the most efficient pick here for a neglected blade that has not been touched in a year.

At 9.25 by 2 by 2 inches and 8 ounces, it is a countertop unit with a soft-touch handle and a small footprint. It carries a 10-year warranty, which matters for a tool that uses replaceable sharpening stages.
Separate stages handle different jobs. The sharpening stage does the metal removal and forms the bevel. The honing stage, built from finer material, removes the burr and straightens the edge without more aggressive abrasion. Running both in sequence is why the result feels cleaner than a single-stage pass.
The CrissCross pattern works the blade in both directions during the stroke, which is intended to produce an arch-shaped edge. Whether that arch is an improvement depends on the knife; on thin blades it leaves a slightly stronger tip and spine profile than a straight grind.
Two preset angles means everything outside those classes is out of scope. A 25 degree European chef’s knife will be reprofiled to something shallower than it was designed for, and a deep 14 degree yanagiba cannot be held correctly at all. The tool does not fail; the geometry simply does not match.
Forum regulars on bladeforums recommend staying with a Sharpmaker-style system for exactly this reason. The adjustable chassis costs more in space and takes longer to set up, but it can match whatever is in the block instead of forcing the block to match the tool.

The diamond stages do a reasonable job on straight-edged sports and pocket knives, which makes this a reasonable one-tool option if your kitchen and your pocket share a sharpening habit. Serrated blades are still better served by a tapered ceramic rod, since a flat slot cannot wrap around each tooth valley.
Skip it if you want fine control over the final edge, because the fixed stages stop refining at a predictable point that some stone users find too coarse. It is also redundant if you already own an adjustable-angle system covering the same 15 and 20 degree range.
1000 and 6000 grit water stone
8 by 2.5 by 1 inch
Injection-molded plastic base
The King is the single-stone answer to a simple question: which manual knife sharpener will still be producing good edges in five years? Its 1000 and 6000 grit combination covers repair and polish, and the stone itself is hard enough to resist rounding quickly.
It holds a 4.6 average across roughly 7,500 reviews, and owners describe the edge quality as the reason for the purchase. The recurring complaint is packaging: the stone is water-based and fragile, and reviewers say corners sometimes arrive chipped.
At 8 by 2.5 by 1 inches and 16 ounces, it is longer and narrower than the Sharp Pebble, which gives a full-length chef’s knife more room along the stone. That matters more than it sounds, because short stones force awkward finger placement near the heel.
Every sharpening method removes metal, but the rates differ by an order of magnitude. A pull-through slot works by scraping with notched carbide and takes far more steel per session to achieve the same result. A 1000 grit stone abrades a thin layer, then the 6000 grit side removes only the burr.
On a knife you plan to keep for a decade, that difference compounds. It is the single strongest argument against buying the cheapest slot device and the clearest reason forum users keep recommending stones once they own good steel.
There is no guide in the box, and there are no written instructions either, which is why the rating is 4.6 rather than 4.8. The feedback most experienced sharpeners give is to watch a technique video first, then rest the blade flat and rock the heel and tip separately rather than sliding the whole length at once.
The plastic base is injection-molded and holds the stone steady on a damp counter. It is not a non-slip mat, so if you work at a wet sink expect to dry the surface first.
Neither side is marked, so grit is identified by feel: the coarser side bites immediately, the finer one glides. Water stones need a soak before use and periodic flattening as the surface cups. A flattening stone appears in the Intelitopia and Wucgea kits further down, and it is the accessory most beginners forget.
It also handles chisels and plane irons, which is a quiet advantage. If you own hand tools, one stone covers two categories of edge.
Skip it if you will not keep the stone wet during a session, because a dry stone glazes and stops cutting. It is also the wrong tool for a beginner who refuses to watch a technique video first, and for anyone sharpening serrated knives, which need a tapered rod instead.
400/1000 and 3000/8000 grit stones
Leather strop plus flattening stone
Angle guide and bamboo base
The Intelitopia set exists because of a simple observation: beginners do not fail at sharpening because the stone is wrong. They fail because the strop, the flattening stone and the angle guide are missing, and each omission produces its own disappointing result.
This kit solves all three in one box. It carries a 4.5 average across about 7,300 reviews, and the common owner verdict is that it is the best complete value package for someone starting out.

At 9 by 8 by 3 inches and 5 pounds, it is a substantial object. The stones are lighter and coarser than Japanese water stones, which makes them less refined in feel but far more tolerant of a rough technique.
The 400 grit side is for reprofiling a badly dull blade and establishing a bevel from scratch. The 1000 grit side is daily sharpening, forming and refining the edge. The 3000 grit side smooths the scratch pattern left behind. The 8000 grit side is the polish stage that produces a reflective edge.
Most home use never needs all four in one session. A weekly routine on a well-maintained knife needs 1000 and 3000. The 400 side comes out twice a year, and the 8000 side is the reward at the end of a careful session.
The genuine cowhide strop with polishing compound is what removes the last wire edge and leaves the apex polished rather than merely sharp. Sharp feels tacky, polished feels slick. That difference is what separates a kitchen edge you can shave with from one that merely slices an onion.
It is also the accessory that does the most for thin Japanese blades, which is why experienced users pair a strop with a stone rather than reaching for a steel rod. The complaint reviewers raise most is that this kit’s strop material feels thinner than a dedicated one.

Both stones need a soak and need to be kept wet while you work, or the surface glazes and stops abrading. The bamboo base is advertised as non-slip, and reviewers report that it can still move on a wet counter, so dry the surface between sessions.
The kit also covers a wider blade range than the single stones here: chef, santoku, paring, sushi, cleaver and pocket knives, plus scissors. The 400 grit side is the right entry point for a thick cleaver that has never been sharpened.
Skip it if you already own a 1000 and 6000 stone and want to spend your money on a strop instead. It is also more than you need for two standard knives, and the extra grit stages are dead weight if you never intend to work on a cleaver or a serrated knife.
400/1000 and 3000/8000 grit stones
Strop with polishing compound
Angle guide and flattening stone
The Wucgea kit overlaps with the Intelitopia set because the same reasoning produced both: a stone alone is not a system. What differentiates this one is the polishing compound that ships with the strop, which is a genuine step up in finishing.
It holds a 4.6 average across nearly 4,900 reviews, and buyers single out the guide, the flattening stone and the strop as the reason it feels worth more than a bare stone.
The stones are white corundum, which is a softer abrasive than the diamond used in slot devices. Softer means slower, and slower means less steel removed per stroke. For a knife already in decent shape, that slower pace is the point.
Compound applied to leather before stropping does two things. It polishes the apex where the geometry is most fragile, and it removes the wire edge that a stone leaves behind so the knife stops feeling grabby on food.
For a Japanese single-bevel blade, the strop is not optional. Those knives have no second bevel to protect, so any burr left at the apex dulls quickly. For a Western double-bevel, the strop is a refinement rather than a necessity.
The included guide is a simple spine stop. Used correctly it removes the most common beginner error, which is gradually changing the angle between the heel and the tip as fatigue sets in. The second-most-common error it does not fix is pressing too hard, which speeds abrasion and produces a rounded edge.
Light pressure and a steady hand matter more than grit. A diamond hone at 600 grit and a whetstone at 1000 grit behave similarly if you lean on them, and neither is what the manufacturer intended.
Water-based stones leave a fine sediment that has to be rinsed off the counter and the blade afterward. This is the honest downside of every stone in this list, and the reason a dedicated sharpening corner of the kitchen is worth setting up.
At 3 pounds the set is heavy enough to stay put without a base, and the bamboo holder with rubber rings keeps the stones from walking during a stroke.
Skip it if a full kit is more commitment than you want, since a single 1000 and 6000 stone covers the same routine with less to store. It is also the wrong set for serrated knives, which a flat stone cannot address. For a mixed kit of straight edges plus a stropping habit, it is hard to argue with.
400 grit and 1000 grit sides
White corundum abrasive
Water-based with rubber base
The KEENBEST stone exists to answer one objection: that a first whetstone is a commitment. At a 4.7 average across nearly 4,600 reviews, it is the highest-rated budget stone in this test, and it does something no slot device can: it abrades rather than scrapes.
Two grits, 400 and 1000, in white corundum. The coarse side establishes a bevel on a dull blade, the medium side smooths it. That is enough to keep a decent knife sharp for months.
At 7 by 2.2 by 1.1 inches and 16 ounces, it is compact, sits on a non-slip rubber base and stays flat on the counter through a normal session.
There is no angle guide, no flattening stone and no strop. That means you are learning the angle freehand and maintaining the flatness of the surface with a method you will have to source separately.
There is also no fine grit, so the edge is functional rather than polished. It will cut well, but it will not produce the reflective finish you get past 3000 grit. For most home kitchens, that difference is only visible if you already know what a polished edge looks like.
Reviewers note it handles chef, hunting, pocket, Japanese, butcher, paring and barbecue knives, plus scissors, chisels, hatchets and axes. That range comes from the 400 grit side, which is aggressive enough to reset a neglected bevel on a thick tool.
That is also why it earns its place next to the sharper dedicated picks. If you own hand tools or a hatchet as well as kitchen knives, this stone covers a category no pull-through in this list touches. Our picks for skinning knives and replaceable-blade hunting knives lean on heavier steel that benefits from coarse abrasive.
Skip it if you want the finest possible edge or if you will not keep the stone wet during a session. It is also the wrong choice for a serious Japanese steel collection, where matching and preserving a precise existing angle matters more than resetting one.
Carbide wheels then ceramic slats
Preset 34 degree guide angle
Lifetime manufacturer warranty
The Wusthof is the one pick here from a century-old Solingen knife maker, and that provenance is the reason to consider it. If you already own Wusthof knives, the preset 34 degree guide angle matches the bevel those knives ship with, which is the entire compatibility argument.
It holds a 4.5 average across roughly 3,600 reviews. Owners who sharpen matching knives love the speed. Reviewers caution against the coarse stage on already-sharp edges and against Asian blades generally.

At 9 by 1 by 1 inches and 238 grams, it is a hand-held design that does not need a counter, though reviewers note it works best on a flat surface with one hand on the tool. The non-slip base keeps it from walking during the stroke.
That is the included angle of a classic Western chef’s knife, which is why the name sits where it does. Run it across a 15 degree Asian edge and you are not sharpening it, you are reprofiling it to a much thicker geometry, taking far more steel and much longer.
The workaround owners use is to skip the coarse stage and use only the ceramic slats on Asian blades, accepting a gentler touch-up in exchange for preserving the edge geometry. It is a compromise, not a fix.
Carbide wheels handle a blunt blade, then ceramic slats refine and polish. On an edge that is already working, go straight to the ceramic stage. Several reviewers say they never use the coarse side at all once their knives are in rotation.
Like other pull-throughs, the resulting edge fades sooner than a stone edge. Treat this as a maintenance companion rather than the main event and it serves its purpose well, especially for someone who sharpens a knife every few weeks rather than on a schedule.

Wusthof warrants its products against manufacturing defects for life. That is meaningful for the mechanism rather than the abrasive, since carbide wheels wear out through use and are not defect. It is a signal about build quality, not a promise of a forever-sharp tool.
Skip it if your kitchen is full of Asian steel, or if you want a repairable system with replaceable parts. It is not the sharpener for a gift, either, because brand loyalty to Wusthof is the only reason to choose it over a similar two-stage unit.
The wrong sharpener is rarely a bad sharpener. It is the right tool pointed at the wrong knife, and the fix costs a paragraph of reading rather than a ruined blade. Start from the knives you own, not from the features on the box.
Honing realigns a rolled edge without removing meaningful steel. Sharpening grinds away metal to form a new edge. Most knives need honing far more often than sharpening, and the ratio in practice runs something like ten to fifteen sessions of honing for every full sharpening.
A steel or ceramic rod is a honing tool. Whetstones, diamond hones and carbide slots are sharpening tools. The most common category mistake is running a carbide slot every week, which removes steel far more often than the edge requires. Hone first, sharpen when the hone stops helping.
Blunt Western double-bevel knives tolerate any method on this list. Hardened Japanese steel at 60 Rockwell and above responds best to a diamond abrasive or a fine water stone, because a coarse slot will chip an edge that thin. Single-bevel knives need a stone plus a strop, and almost no slot device holds the geometry correctly.
Serrated blades are the exception across the board. A flat stone and a flat slot both do almost nothing for the fine teeth. A tapered ceramic rod is the tool that actually fits between the scallops, and it is inexpensive enough that it is worth owning alongside whatever else you buy.
An included angle guide is the most useful feature for a beginner, because it removes the single hardest part of stone sharpening. An adjustable chassis is the most useful feature for a mixed kitchen, because it lets different blades keep different angles. A fixed slot angle is the least flexible option and should only be chosen for knives you have already identified as a match.
Our picks for hunting knife sharpeners take a different angle on the same question, since field blades need portability and edge retention over a different set of priorities.
A rough rule of thumb: a pull-through slot removes enough steel per session to matter if used weekly, a 1000 grit stone removes a layer you will not notice for years, and a 6000 grit side removes only the burr. If a knife has never been sharpened by hand before, a stone is the gentler place to start.
There is a point where professional sharpening makes more sense than learning. A single-bevel yanagiba, a badly chipped blade or a full block of Japanese knives is a mail-in job, not a weekend project. Our manual picks cover standard straight edges well; anything beyond that is a different category of problem.
Hand-held slots need nothing but a rinse. Stones need soaking, wet surfaces during use and periodic flattening. Guided systems need abrasive replacement, which is the one real argument in favor of buying a chassis with a known refill supply.
A worn carbide slot tells you plainly: no matter how many strokes you take, the edge stops improving. A worn stone cups in the middle and leaves a rough, uneven edge. A worn diamond stage on a guided system stops cutting fast. None of these are expensive failures, but all three are worth recognising before you blame the knife.
For most kitchens it is a hand-held carbide sharpener such as the AccuSharp, which restores a dull edge in about ten seconds with no technique and a reversible blade. If you sharpen regularly and want repeatable geometry, an adjustable-angle guided system is better. A whetstone produces the finest, longest-lasting edge but requires practice to use.
Yes, with a caveat about which type you use. Hand-held carbide slots are excellent rescue tools and poor maintenance tools because they remove a lot of steel per session. Water stones remove very little steel and produce the best edges, but they need practice, soaking and occasional flattening. Guided systems sit between the two and are the most repeatable option.
Not on their own, but they are easy to misuse. A pull-through works by scraping with notched carbide at a fixed angle, so running it weekly instead of only when the edge fails removes far more steel than the knife needs. Use one for rescue work, hone with a rod in between sessions, and never run one across a low-angle Japanese edge.
Serrated blades should not be run through a flat whetstone or a slot sharpener, because neither follows the scalloped teeth. Single-bevel Japanese knives, such as yanagiba and deba, are difficult for most manual devices and need a stone plus a strop. Ceramic blades are non-magnetic and cannot be held by magnetic-based systems.
Professional kitchens overwhelmingly use a whetstone, typically a 1000 grit water stone followed by a finer stone or a strop, because it removes the least steel and holds an exact angle. A steel or ceramic honing rod is used between sharpenings to realign the edge. Home cooks usually want a guided system instead, since freehand stone technique takes months to acquire.
Pick the AccuSharp carbide hand-held if you want the shortest path to a sharp knife and own mostly standard Western edges. Pick the Work Sharp Precision Adjust if you sharpen more than one knife regularly and want an exact, repeatable bevel angle. Pick the Sharp Pebble or Intelitopia set if you are willing to learn a whetstone routine and want an edge that holds longer.
If your block is mostly serrated or single-bevel Japanese, spend your money on a tapered ceramic rod and a stone with a strop rather than on any slot device in this list. And if you only sharpen twice a year, the cheapest pull-through here is genuinely enough.
Whichever way you go, hone with a rod between sessions and sharpen only when the edge stops responding. That single habit does more for your knives than the choice between sharpeners.