Gyuto Club

The Best Serrated Knife Sharpeners

Most sharpeners cannot touch a serrated blade, and the ones that can work differently from anything else in the drawer: one gullet at a time, from one side only.

By Stephen V.Last updated How we pick

Buy the DMT Diafold Serrated, Fine. It is a tapered diamond rod that fits itself to whatever diameter each scallop happens to be, DMT publishes the grade (600 mesh / 25 micron), and it folds into its own handle so it survives a drawer. If you want to spend less, the Lansky Folding Diamond Tapered Rod does the same job for noticeably less money and tells you less about itself. If you would rather not do it by hand at all, the Chef’sChoice 15XV is the one electric sharpener here whose maker states it handles serrated edges.

Serrated knives get treated as unsharpenable, and the reason is that the tools most people own genuinely cannot sharpen them. A flat stone touches only the points of the teeth. A pull-through carbide slot grabs the scallops. A grooved honing steel does nothing useful. The geometry is the problem, and it is worth being precise about it: as the specialist guidance for this category puts it, “most serrated knives are chisel ground, one side is beveled, while the back is flat.” You are not sharpening an edge, you are sharpening a row of individual curved bevels — and only from the beveled side.

So the selection criteria for this page are unusually narrow and unusually mechanical. Everything below is ranked on published abrasive grade, on whether the tool is tapered, on working length, and on whether the maker says in writing that it is for serrated edges. Where a maker publishes nothing — Lansky prints no mesh or micron figure for its rod — the table says so rather than guessing. We have not sharpened a bread knife with every one of these; our methodology page explains what we do instead, and the technique itself is in how to sharpen a serrated knife.

How this is funded: we earn a commission if you buy through our links, at no extra cost to you. As an Amazon Associate we earn from qualifying purchases. It never changes which knife we recommend, and we’ll tell you when we’d skip one. Full disclosure.

Quick picks

Ranked on steel, hardness, geometry and buyer fit. Select a row to jump to the full write-up. We have not cut with every one of these — here is exactly how we compared them instead.

#KnifeBest forPrice
1
DMT Diafold Serrated Knife Sharpener, Fine (FSKF)

DMT Diafold Serrated Knife Sharpener, Fine (FSKF)

The tool a serrated knife actually needs: a tapered diamond rod that fills each gullet at whatever diameter it happens to be, from a bread knife's wide scallops down to a pocket knife's. Folds into its own handle, which is why it survives a drawer.

Best overall
$31.59 · View on Amazon

Price as of October 7, 2026. #ad How we’re funded

2
Lansky Folding Diamond Tapered Rod

Lansky Folding Diamond Tapered Rod

The cheaper tapered rod. Same idea as the DMT — a cone of diamond abrasive that fits itself to each scallop — with a folding handle and a lower price. Lansky does not publish a mesh or micron figure for it, which is the one thing we hold against it.

Best budget
$20.69 · View on Amazon

Price as of October 7, 2026. #ad How we’re funded

3
Chef'sChoice 15XV EdgeSelect Electric Sharpener

Chef'sChoice 15XV EdgeSelect Electric Sharpener

The electric sharpener people who hate sharpening actually keep using. Three stages, diamond abrasives in the first two, and a jig that converts a 20-degree Western edge to a 15-degree one. It is fast and consistent — and it eats far more steel than a stone ever would.

Best hands-off option
$135.99 · View on Amazon

$165.9918% off

Price as of October 7, 2026. #ad How we’re funded

4
DMT D8F Dia-Sharp 8-inch Bench Stone, Fine

DMT D8F Dia-Sharp 8-inch Bench Stone, Fine

The single-grit, continuous-surface plate — no holes, so nothing catches a thin blade tip on the way across. Fine 600 is the grit a kitchen knife actually lives at, and this is the version to buy if you want one plate that does the job properly rather than two that do it adequately.

Best for the flat back
$65.29 · View on Amazon

Price as of October 7, 2026. #ad How we’re funded

The picks in full

#1Best overall

DMT Diafold Serrated Knife Sharpener, Fine (FSKF)

The tool a serrated knife actually needs: a tapered diamond rod that fills each gullet at whatever diameter it happens to be, from a bread knife's wide scallops down to a pocket knife's. Folds into its own handle, which is why it survives a drawer.

Strengths

  • Tapered, so one rod fits every serration size instead of only one
  • DMT publishes the grade: Fine is 600 mesh / 25 microns
  • Folds into the handle — no sheath to lose, no exposed abrasive in a drawer

Trade-offs

  • Diamond cuts fast, so a heavy hand rounds the teeth quickly
  • 4-inch working length means a long bread knife takes a while
TypeManual tapered rod, one gullet at a time
AbrasivesFine — 600 mesh (25 µm)
Abrasive materialMonocrystalline diamond on a tapered rod
Angle controlFollows the knife's existing single-side bevel
DimensionsNot published

Specs read from the manufacturer listing, on August 18, 2026. “Not published” means the maker does not state that figure.

#2Best budget

Lansky Folding Diamond Tapered Rod

The cheaper tapered rod. Same idea as the DMT — a cone of diamond abrasive that fits itself to each scallop — with a folding handle and a lower price. Lansky does not publish a mesh or micron figure for it, which is the one thing we hold against it.

Strengths

  • Tapered profile fits a wide range of serration sizes
  • Folding handle, so it travels and stores safely
  • Costs noticeably less than the specialist alternatives

Trade-offs

  • No published mesh or micron grade — you are told 'diamond' and nothing more
  • As with any diamond rod, it removes metal faster than you expect
TypeManual tapered rod, one gullet at a time
AbrasivesNot published
Abrasive materialDiamond-coated tapered rod
Angle controlFollows the knife's existing single-side bevel
DimensionsNot published

Specs read from the manufacturer listing, on August 18, 2026. “Not published” means the maker does not state that figure.

#3Best hands-off option

Chef'sChoice 15XV EdgeSelect Electric Sharpener

The electric sharpener people who hate sharpening actually keep using. Three stages, diamond abrasives in the first two, and a jig that converts a 20-degree Western edge to a 15-degree one. It is fast and consistent — and it eats far more steel than a stone ever would.

Strengths

  • Sets a consistent 15° edge on knives that arrived at 20°
  • Diamond abrasives in stages 1 and 2; a flexible stage 3 for polishing and serrations
  • About a minute for a first sharpening, seconds to touch up afterwards

Trade-offs

  • Motorized abrasion removes real metal — it shortens the life of a knife you sharpen often
  • Not for single-bevel Japanese knives, and heavy-handed on thin, hard blades
TypeElectric, motor-driven
Abrasives3-stage: 2 diamond stages + flexible polishing stage
Abrasive materialDiamond abrasives
Angle controlFixed 15° per side (converts 20° edges)
DimensionsNot published

Specs read from the manufacturer listing, on August 10, 2026. “Not published” means the maker does not state that figure.

#4Best for the flat back

DMT D8F Dia-Sharp 8-inch Bench Stone, Fine

The single-grit, continuous-surface plate — no holes, so nothing catches a thin blade tip on the way across. Fine 600 is the grit a kitchen knife actually lives at, and this is the version to buy if you want one plate that does the job properly rather than two that do it adequately.

Strengths

  • Unbroken diamond face — a delicate tip cannot drop into an interrupted hole
  • Fine 600 mesh (25 µm) is the working grit for most kitchen sharpening
  • Made in the USA, and flat to a tolerance a water stone never holds

Trade-offs

  • One grit only — you need a coarser plate for a badly damaged edge
  • Costs about the same as the double-sided SHARPAL for half the grits
Grit(s)Fine 600 mesh (25 µm)
MaterialMonocrystalline diamond on continuous nickel surface
PrepDry or with water — no soaking
Base includedNo
Dimensions8 x 3 x 0.38 in.

Specs read from the manufacturer listing, on August 11, 2026. “Not published” means the maker does not state that figure.

The four criteria, in order

1. It has to be tapered.This is the one that eliminates most of the market. Serrations are not a single size — a bread knife’s scallops are wide, a utility knife’s are narrow, and on many blades they alternate between large and small within the same edge. A cylindrical rod fits exactly one diameter and bridges across every other, grinding the tips of the teeth instead of the gullet between them. A cone fits itself to each one: you slide along the taper until the diameter matches, which is why a single tapered rod can service every serrated knife in a kitchen. The practical rule from the specialist instructions is to “position the rod so it fills the gullet without riding up onto the teeth.”

2. The abrasive grade has to be published.Diamond on a tapered rod removes steel quickly, which is both why it works and why grade matters. DMT prints its own color-coded grades — Coarse at 325 mesh / 45 micron, Fine at 600 mesh / 25 micron, Extra-Fine at 1200 mesh / 9 micron — and the Diafold we recommend is the Fine. For maintaining an edge rather than rebuilding it, Fine is the right choice: coarse diamond in a gullet will reshape the scallop before you notice. Lansky does not publish any figure for its rod, which is the single thing we hold against an otherwise sensible tool.

3. One side only, and the right side.Because the bevel is on one face and the back is flat, you work the beveled side and you do not grind a new bevel into the flat. The flat side gets only deburring, edge-trailing and very light — which is the job the fourth pick on this page does. Get this wrong and you convert a chisel-ground serrated edge into something with two bevels and no consistent geometry.

4. Working length against your longest blade. The Diafold gives you a 4-inch rod. On a 9-inch bread knife with 30-odd gullets that is a methodical few minutes, not a quick pass. It is not a flaw so much as the nature of the job: there is no tool that sharpens a serrated edge in one stroke, and anything claiming to is grinding the teeth flat.

Why each pick is here

  • DMT Diafold Serrated, Fine (FSKF) — the right tool. A 4-inch tapered monocrystalline diamond rod at a published Fine 600 mesh / 25 micron, folding into its own handle. It is purpose-built for this job rather than adapted to it, the taper covers every serration size we have come across, and the folding handle means there is no sheath to lose and no exposed abrasive loose in a drawer. The cons are honest: diamond cuts fast, so a heavy hand rounds the teeth, and 4 inches of working length makes a long bread knife a patient exercise.
  • Lansky Folding Diamond Tapered Rod — the cheap version of the same idea.Same cone-of-diamond principle, same folding format, appreciably less money. What you give up is disclosure: Lansky states “diamond” and no mesh or micron grade, so you cannot know whether you are maintaining an edge or reshaping it until you have used it. Worth noting that on the day we checked, the listing read as in stock but low — it is the kind of item that drifts in and out of availability.
  • Chef’sChoice Trizor XV 15XV — if you will not do it by hand.EdgeCraft states that this model “sharpens and maintains both straight-edge and serrated blades,” and its own user guide gives the serrated procedure explicitly: “use only Stage 3” with “five (5) to ten (10) pairs of alternating pulls.” That is a real, documented serrated capability rather than a marketing bullet. Two caveats. It is maintenance, not restoration — stage 3 polishes the existing tooth tips rather than re-cutting gullets. And the same manual says to “not attempt to use this sharpener to sharpen either ceramic knives or scissors,” so do not stretch it beyond what it claims. Our full review covers what the three stages do and how much steel they take.
  • DMT Dia-Sharp D8F — for the flat back, and nothing else.This is not a gullet tool; it is the flat, continuous-surface plate you lay the back of the blade on to remove the burr after you have worked the bevels. The specialist instruction for the category is edge-trailing deburring on the flat side, and a plate that DMT guarantees “not to hollow or groove” is the right surface for it — a dished stone would round the flat you are trying to keep flat. Fine at 25 micron / 600 mesh matches the Diafold, which keeps the two steps consistent. Full detail in our D8F review.

The method, once you have the tool

  1. Find the beveled side. Hold the blade up to a light and look at the teeth end-on. One face is ground, the other is flat. Everything happens on the ground face.
  2. Mark the bevel.Color one gullet’s bevel with a permanent marker and take two light strokes. If the ink comes off evenly you are matching the existing angle; if it comes off at the top or bottom only, adjust before you do the other twenty-nine. This is the same marker trick our troubleshooting guide uses on a straight edge.
  3. Match the rod diameter to the gullet. Slide along the taper until the rod fills the scallop without riding up onto the points either side.
  4. Few strokes, one direction, light pressure.Three or four passes per gullet is usually plenty on diamond. Count them and keep the count identical across every scallop — that consistency is what keeps the tooth line even.
  5. Work along the blade without skipping. Every gullet, heel to tip. It is tedious and there is no shortcut; this is why professional sharpening services charge more for serrated knives.
  6. Deburr the flat side. Lay the flat face on the plate and draw it edge-trailing, two or three very light passes. Do not grind a bevel onto the flat.
  7. Test on paper, not on bread. Our sharpness tests give you a repeatable check; a loaf tells you very little.

What not to buy for this job

A pull-through carbide sharpener. Two fixed carbide teeth at a fixed angle. On a straight edge they tear steel out; on a serrated edge they grab the scallops and flatten the points. Nothing about the format can work here.

A cylindrical honing rod, ceramic or steel.One diameter, which fits one size of gullet and bridges all the others. A smooth ceramic rod is an excellent daily tool for a hard straight edge — it is in our honing rod roundup for exactly that — and it is the wrong shape for this.

A flat whetstone, used the normal way.A stone contacts only the tips of the teeth. You can take a serrated knife to a stone and what you will produce, eventually, is a straight edge with a decorative wavy line above it. If that is genuinely what you want, it is a legitimate choice — just know that is what is happening. Our whetstone roundup is for everything else in the drawer.

An electric sharpener whose maker does not mention serrated blades. Most do not, and the omission is deliberate. A machine with fixed abrasive geometry and spring pressure, driven across a scalloped edge, flattens teeth. The 15XV is on this page precisely because EdgeCraft documents a serrated procedure; treat silence from any other manufacturer as a no. The wider field is in our electric sharpener roundup.

How often, and when to stop bothering

Serrated knives need sharpening far less often than straight edges, for a structural reason: the points take the impact and protect the recessed cutting edges inside the gullets, which rarely touch the board at all. A bread knife in a home kitchen can go years. The honest signal that it is time is a knife that crushes a loaf rather than cutting it, or that skates on tomato skin.

There is also a point at which this stops being worth your time. If the points have been ground flat by a pull-through sharpener, or the knife is a cheap stamped blade whose replacement costs less than an hour of your evening, buy a new one. The tools on this page are worth owning if you have a serrated knife you intend to keep — a good bread knife, a Japanese set’s serrated piece, a utility knife you like. They are not worth owning to rescue a supermarket bread knife.

If you would rather pay someone, published rate cards from sharpening services run a few dollars per knife for standard work, with serrated and repair work priced above that; the figures are in our professional sharpening piece.

How we ranked these

We do not own these tools. The order comes from whether the tool is tapered (the one criterion that cannot be worked around), the abrasive grade each maker publishes, the working length, and whether the manufacturer states in writing that the product is for serrated edges. Every listing featured here was checked against a live catalog lookup on the publication date and returned as purchasable; the Lansky read in stock but low. Where a maker publishes no abrasive grade, the specification table says so instead of estimating, and prices come only from our live price layer with the date they were read.

Frequently asked questions

Can serrated knives be sharpened?

Yes, one scallop at a time and from one side only. Most serrated knives are chisel ground — one face is beveled, the back is flat — so the sharpening happens inside each gullet on the beveled side, with the flat side only deburred. What cannot do the job is a flat stone, a pull-through carbide sharpener or a cylindrical honing rod.

What is the best serrated knife sharpener?

The DMT Diafold Serrated in Fine, for most people. It is a 4-inch tapered diamond rod at a published 600 mesh / 25 micron that folds into its own handle, so one tool fits every serration size in a kitchen. The Lansky Folding Diamond Tapered Rod is the cheaper version of the same idea but publishes no abrasive grade.

Why does the sharpener need to be tapered?

Because serrations are not one size. Scallops differ between knives and often alternate within a single edge, so a cylindrical rod fits one diameter and bridges across the rest, grinding tooth tips instead of the gullet. A tapered rod lets you slide along the cone until the diameter matches each gullet — the rule is to fill the gullet without riding up onto the teeth.

Can an electric sharpener do serrated knives?

Only if its maker says so. EdgeCraft states that the Chef'sChoice 15XV 'sharpens and maintains both straight-edge and serrated blades' and its user guide specifies the procedure: Stage 3 only, five to ten pairs of alternating pulls. Most electric sharpeners say nothing about serrated edges, and that silence should be read as a no — fixed abrasive geometry under spring pressure flattens teeth.

What grit should I use on a serrated edge?

Fine. DMT publishes Fine as 600 mesh / 25 micron, which maintains an edge without reshaping the scallop. Coarse diamond — 325 mesh / 45 micron — removes steel fast enough to change the gullet profile before you notice, so keep it for genuine damage only.

Do I sharpen both sides of a serrated knife?

No. Work only the beveled side, inside each gullet. The flat back gets two or three very light edge-trailing passes on a flat plate to remove the burr, and nothing more. Grinding a bevel into the flat side turns a chisel-ground edge into something with inconsistent geometry.

How often do serrated knives need sharpening?

Far less often than straight edges — a home bread knife can go years. The points take the board contact and shield the actual cutting edges recessed in the gullets. Sharpen when the knife crushes bread instead of slicing it, or skates on tomato skin, rather than on a schedule.

Is it worth sharpening a cheap bread knife?

Usually not. Sharpening a serrated blade is a per-gullet job that takes real time, so if the knife costs less than an evening of your attention — or if a pull-through sharpener has already ground the points flat — replace it. These tools are worth owning for a serrated knife you intend to keep.

Sources

  • How to Sharpen a Serrated Knife with the DMT Serrated Knife Sharpener — Sharpening Supplies — 'Most serrated knives are chisel ground, one side is beveled, while the back is flat' — plus the tapered-rod fit ('position the rod so it fills the gullet without riding up onto the teeth'), the marker trick for staying on the bevel, and edge-trailing deburring on the flat side (accessed August 18, 2026)
  • DMT Diamond and Ceramic Color-Coded Grit Chart — Sharpening Supplies — DMT's own color codes with the mesh and micron figure for each grade (Coarse 325/45 µm, Fine 600/25 µm, Extra-Fine 1200/9 µm) (accessed August 11, 2026)
  • 8-in. Dia-Sharp Bench Stone - Fine (D8F) — DMT Diamond Sharpeners — DMT's own product page for SKU D8F: 'Guaranteed not to hollow or groove', a 'precisely engineered Dia-Sharp Bench Stone with continuous diamond surface assures consistent, even sharpening every time', 'fine diamond (25 micron / 600 mesh) for honing a razor sharp edge', 'non-skid rubber feet with the diamond grit clearly marked on side of stone', a 'micronized monocrystalline diamond surface', 'No messy oils are needed either, allowing you to sharpen dry or with water', 'Sharpening surface accommodates range of edges from large knives to small pointed tools', suitable for 'edge repair and honing' and for 'flattening plane soles, irons and chisel backs', and 'Made in the USA'. DMT's own store price on the access date was substantially above what the Amazon listing has been running at. No weight is published (accessed October 7, 2026)
  • DMT FAQ — DMT Diamond Sharpeners — DMT's own answers: on break-in, 'the diamond surface will seem aggressive in nature; the diamond sharpener will smooth after initial sharpening with no impact to long term performance. Your first few sharpenings are the break-in period'; 'DMT recommends you use DMT products dry or with water only'; care is to 'clean after each use with water and wipe dry' and 'After several sharpenings, use a mild kitchen abrasive cleanser and a nylon scrub brush'; on life, DMT sharpeners 'do not last forever, but they last for several years'; the polka-dot surfaces are 'slightly recessed' so debris falls away while Dia-Sharp's 'continuous diamond surface' suits 'small-pointed tools'; DMT recommends 'sharpening at a 20-degree angle' and notes 'sharpening at the proper angle is not as important as sharpening at a constant angle'; and the guarantee: 'If your product fails to perform due to defects in materials or workmanship, we will replace it regardless of age' (accessed September 18, 2026)
  • Chef'sChoice Model 15XV Professional Electric Knife Sharpener, 3-Stage 15-Degree Trizor (0101500) - Chef's Choice by EdgeCraft — EdgeCraft's published description of this model: it 'upgrades traditional 20° factory edges into sharper 15° edges', the '3-stage system creates the Trizor XV® edge - a unique triple-bevel design built for strength, durability, and long-lasting sharpness', Stage 1 'Shapes the edge using 100% diamond abrasives', Stage 2 'Refines and sharpens for precision', Stage 3 'Polishes for a clean, finished edge' with 'patented stropping disks', it 'Sharpens and maintains both straight-edge and serrated blades' and 'delivers consistent, expert-level sharpening in about one minute', 'Covered by the Chef'sChoice Three-Year Limited Warranty'. No motor rating, dimensions or weight are printed on the page (accessed August 28, 2026)
  • Chef'sChoice 0101500 Trizor XV Electric Knife Sharpener - User Guide — A reproduction of EdgeCraft's own user guide for this model. It states that on a first sharpening of a European/American edge 'it may take up to 20 pair of pulls to fully re-angle the edge of a thin blade', that on a contemporary Asian blade 'only a few (1-2) pairs of alternating pulls... will be needed to develop a burr', that afterwards 'you should be able to re-sharpen to a razor sharp edge 3 or more times using only Stage 3', that serrated blades 'use only Stage 3' with 'five (5) to ten (10) pairs of alternating pulls', that you should 'not attempt to use this sharpener to sharpen either ceramic knives or scissors' nor 'ax blades or any blade that does not fit freely', and gives '125W on the nameplate' at 120V (accessed August 28, 2026)
  • Knife sharpening — Wikipedia — Reference on edge angle, coarse-to-fine grit progression, and honing vs sharpening (accessed July 21, 2026)

Per-knife specs (steel, HRC, blade length, geometry) are read from each maker’s spec sheet or product listing and dated on the individual review cards above. “Not published” means the manufacturer does not state that figure — we flag it rather than guess.

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