10 Best Diamond Sharpening Stones for Kitchen Knives (October 2026)
The best diamond sharpening stones for kitchen knives include the SHARPAL 162N Diamond Sharpening Stone for home cooks, the DMT D8F Dia-Sharp Bench Stone for fine edge upkeep, and the DMT Deluxe Diamond Sharpening Kit for three-stage sharpening.
On this page (10 sections)
- Which diamond sharpening stone fits your kitchen knives?
- How did we compare diamond sharpening stones?
- How should you choose the best diamond sharpening stone?
- How do you set up and use a diamond sharpening stone?
- Which diamond sharpening stone should you choose?
- Are diamond sharpening stones good for kitchen knives?
- What grit diamond stone should I use for kitchen knives?
- Do diamond sharpening stones need water?
- Can a diamond stone sharpen hard knife steel?
- How do you choose between a single-grit plate and a set?
The SHARPAL 162N is the best diamond sharpening stone for most home cooks who want a full-size plate with two useful stages and help holding a steady angle. For more control between coarse repair and refinement, choose a three-stone kit; for regular fine upkeep, a single-grit plate may be enough.
Diamond plates suit cooks who want a firm, flat sharpening surface and a straightforward setup. The main choice is whether you need one grit, two faces on one plate or several separate stones.
A full-size plate offers more room for long strokes, while a shorter model takes less space. Match those tradeoffs to the knives you sharpen and the room you have to work.
For a broader look at stone types and formats, start with our kitchen knife sharpening stone buyer's guide. Our guide to diamond stones versus whetstones explains the main tradeoffs.
Our picks at a glance
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Check itSHARPAL 168H Diamond Sharpening Stone
Best for 1000-grit finishing - 5
Best for medium-grit workCheck it - 6
Check itSHARPAL 156N Diamond Sharpening Stone
Best for compact kitchens - 7
Check itUltra Sharp Diamond Stone Set 8x3
Best for long bench strokes - 8
Check itUltra Sharp II Diamond Stone Kit
Best for limited storage - 9
Check itTrend 8-Inch Diamond Bench Stone 300/1000
Best for included care tools - 10
Best for a 400/1000 pairCheck it
Which diamond sharpening stone fits your kitchen knives?
The SHARPAL 162N is the strongest general-purpose choice in this roundup because it combines a coarse face, a finer face and setup accessories. The other picks fit a narrower need, such as a compact bench, a single sharpening stage or a three-grit progression.
SHARPAL 162N Diamond Sharpening Stone: Best for home cooks
- 8 x 3 in sharpening surface
- 325 and 1200 grit faces
- Non-slip pad and angle guide
- Dry sharpening
Two grit faces cover quick edge setting and honing, while the included pad and angle guide support a steady setup.
Pros
- Two useful grit faces
- Large bench-stone surface
- Includes a non-slip pad and angle guide
Cons
- No medium grit face
- SHARPAL advises against water during sharpening
The 162N pairs a 325 grit coarse face for setting an edge with a 1200 grit extra-fine face for honing. Its 8 x 3 in surface leaves room for longer strokes on a chef's knife.
The storage box includes a non-slip rubber pad that can serve as a base, plus an angle guide with 14°, 17°, 20° and 25° options. SHARPAL advises dry sharpening and says to avoid water during use.
This is a good fit if you're starting a home sharpening setup and want useful accessories in the same package. Skip it if you need a middle grit between coarse work and honing, or if you'd rather buy separate stones for each stage.
DMT D8F Dia-Sharp Bench Stone: Best for fine edge upkeep
- 8 x 3 in continuous diamond surface
- Fine grit
- Four non-skid rubber feet
- Can be used dry or with water
This single-face plate suits routine fine sharpening when you already have a coarse stone or do not need a dual-grit surface.
Pros
- Continuous surface across the plate
- Stable rubber feet
- Dry or water use
Cons
- Only one grit
- No angle guide included
The DMT Dia-Sharp is a single-face fine diamond plate measuring 8 x 3 in. Four non-skid rubber feet support it on a bench, and it can be used dry or with water.
Choose it for routine fine sharpening or maintenance when you already have a coarser stone. It's a poor fit as your only sharpening stone if you need to repair a very dull edge, since this plate has just one fine grit.
DMT describes the sharpening surface as continuous across the plate. That format suits kitchen knives as well as pointed tools and larger blades.
DMT Deluxe Diamond Sharpening Kit: Best for three-stage sharpening
- Three 6 in diamond stones
- 325, 600 and 1200 grit
- Color-coded stones
- Hardwood box
Three separate stones give you a coarse, fine and extra-fine progression, with a hardwood box to keep the set together.
Pros
- Three grit stages
- Color-coded stones
- Includes a hardwood box
Cons
- Requires changing stones between stages
- Shorter stones than 8 in bench plates
The DMT Deluxe Kit gives you three separate 6 in stones: coarse 325, fine 600 and extra-fine 1200 grit. The color-coded stones come in a hardwood box.
The intermediate stage gives you another option between edge setting and refinement. DMT's sharpening guide recommends a 20-degree angle for most edges and light strokes away from the body.
Pick this kit if you want distinct stages for repair, sharpening and finishing. Skip it if you want one plate that stays set up on the bench, since you'll need to switch stones and store the set.
SHARPAL 168H Diamond Sharpening Stone: Best for 1000-grit finishing
- 8 x 3 in sharpening surface
- 325 and 1000 grit faces
- Non-slip pad and angle guide
- Monocrystalline diamond
The 168H pairs a coarse face for dull edges with an extra-fine face for honing, in a full-size format with a pad and angle guide.
Pros
- Two grit faces
- Full-size bench-stone surface
- Includes setup accessories
Cons
- No medium grit face
- The coarse and fine labels may not match every brand's grit scale
The 168H is a full-size dual-grit option, with 325 and 1000 grit faces on an 8 x 3 in plate. Its coarse side is intended to restore dull edges, and the finer side is for honing.
A non-slip pad and 4-angle guide come with it. SHARPAL describes the plate as suitable for knives and tools, including woodworking edges such as chisels and plane blades.
Choose this over the 162N if you prefer a 1000 grit finishing face. Skip both if you need a separate medium stage rather than moving directly from coarse to fine.
Atoma 400 Diamond Plate: Best for medium-grit work
- 400 grit medium-rough plate
- 8 in length
- Diamond abrasive
The Atoma 400 is a single-grit plate for buyers who want a medium-rough surface and already have a separate finishing option.
Pros
- Clear 400 grit designation
- 8 in length
- Simple single-grit setup
Cons
- Only one grit
- No included base or guide specified
The Atoma 400 is a single 400 grit medium-rough plate measuring 8 x 2.77 in. It suits someone who knows they need a middle grit and already has a coarser option or a finishing stone.
Its straightforward, single-grit format keeps the choice simple. Skip it as a first and only stone if you want both edge repair and final refinement from one purchase.
SHARPAL 156N Diamond Sharpening Stone: Best for compact kitchens
- 6 x 2.5 in sharpening surface
- 325 and 1200 grit faces
- Non-slip pad and angle guide
- Dry sharpening
The 156N offers the same coarse and extra-fine grit pairing as the 162N in a shorter format for a smaller work area.
Pros
- Two grit faces
- Includes a non-slip pad and angle guide
- Shorter plate than the 162N
Cons
- Less working length than a full-size 8 in stone
- No medium grit face
The 156N brings the same 325 and 1200 grit pairing as the 162N in a shorter 6 x 2.5 in plate. Its smaller footprint can fit a crowded work area or a compact storage spot.
It includes a storage box, non-slip pad and angle guide with four angle choices. SHARPAL advises dry sharpening and says to avoid water during use.
Choose the 156N if space matters more than having a full-size sharpening surface. Skip it if you sharpen long chef's knives and prefer extra room for each stroke.
Ultra Sharp Diamond Stone Set 8x3: Best for long bench strokes
- Three 8 x 3 in stones
- 300, 600 and 1200 grit
- Stone holder included
- Diamond and steel construction
Three full-size plates cover coarse, medium and extra-fine work, and the included holder fits stones from 6 to 9 in long.
Pros
- Full 8 x 3 in surface on each stone
- Three grit stages
- Holder included
Cons
- Takes more storage space than a dual-sided plate
- Separate stones require swapping during sharpening
Ultra Sharp's set has three full-size plates at 300, 600 and 1200 grit. A holder is included and fits stones from 6 to 9 in long.
The stages cover coarse, medium and extra-fine work. The full 8 x 3 in surface on each plate gives you more room than the compact three-stone kit.
Pick it if you want a full progression and have a stable bench with room to set out separate stones. Skip it if you want a low-storage setup or don't need all three stages.
Ultra Sharp II Diamond Stone Kit: Best for limited storage
- Three 2 x 6 in stones
- 300, 600 and 1200 grit
- Diamond and steel construction
This smaller three-stone kit gives you coarse, medium and extra-fine options when an 8 in set would take too much room.
Pros
- Three grit stages
- Shorter stones take less bench space
- Diamond and steel construction
Cons
- Narrower and shorter than full-size plates
- No holder included
The Ultra Sharp II kit includes three 2 x 6 in stones in 300, 600 and 1200 grit. It offers the same general coarse-to-fine progression as larger kits in a smaller format.
Choose this when storage space matters more than a wide, full-size working surface. Its narrower plate can feel less roomy with a broad chef's knife, and no holder is included.
Trend 8-Inch Diamond Bench Stone 300/1000: Best for included care tools
- 300 and 1000 grit faces
- Non-slip mat
- Cleaning block and storage pouch
- Diamond surface with clearance channels
The Trend combines two grit faces with a mat, cleaning block and pouch for buyers who want those accessories in one kit.
Pros
- Coarse and extra-fine faces
- Includes a cleaning block and pouch
- Clearance channels for small or pointed tools
Cons
- Trend recommends lapping fluid for best results
- No angle guide specified
The Trend plate pairs 300 and 1000 grit faces on an 8 x 3 in bench stone. A non-slip mat, cleaning block and storage pouch are included, and the coarse face has clearance channels for small or pointed tools.
Trend recommends its lapping fluid for best sharpening results. Choose it if the included care accessories and channel design suit your work; skip it if you want a setup that needs no fluid.
S SATC Diamond Stone 400/1000: Best for a 400/1000 pair
- 400 and 1000 grit faces
- 8 in diamond plate
- Monocrystalline diamonds
A 400/1000 dual-grit plate offers a medium starting face and a finer face for edge refinement in one stone.
Pros
- Two grit faces
- 8 in length
- Simple plate format
Cons
- No holder or angle guide included
- The face labels differ from other grit pairings here
The S SATC plate has 400 and 1000 grit faces on an 8 in diamond surface. The 400 face offers a medium starting point, while the 1000 face is for refining an edge.
This is a simple two-stage option if those grit levels fit your routine. No holder or angle guide is specified, so skip it if you want those accessories included.
How did we compare diamond sharpening stones?
The scores reflect each stone's grit range, size, setup accessories and fit for common kitchen knife sharpening tasks. A higher score means the features line up more closely with this roundup's use case.
The 162N ranks first because it pairs two useful grit faces with a full-size surface, non-slip pad and angle guide. Three-stone sets offer more stages, while single-grit plates make sense when you already have the rest of your setup.
| Product | Best for | Grits | Surface | Extras | Our score |
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| SHARPAL 162N Diamond Sharpening Stone | home cooks | 325 and 1200 | 8 x 3 in | Storage box, non-slip pad and angle guide | 8.9 |
| DMT D8F Dia-Sharp Bench Stone | fine edge upkeep | 8 x 3 in | 8.5 | ||
| DMT Deluxe Diamond Sharpening Kit | three-stage sharpening | 325, 600 and 1200 | 8.4 | ||
| SHARPAL 168H Diamond Sharpening Stone | 1000-grit finishing | 325 and 1000 | 8 x 3 in | Non-slip pad and angle guide | 8.2 |
| Atoma 400 Diamond Plate | medium-grit work | 8 x 2.77 in | 8.2 | ||
| SHARPAL 156N Diamond Sharpening Stone | compact kitchens | 325 and 1200 | 6 x 2.5 in | Storage box, non-slip pad and angle guide | 8.1 |
| Ultra Sharp Diamond Stone Set 8x3 | long bench strokes | 300, 600 and 1200 | 8 x 3 in per stone | 8.0 | |
| Ultra Sharp II Diamond Stone Kit | limited storage | 300, 600 and 1200 | 2 x 6 in per stone | 7.8 | |
| Trend 8-Inch Diamond Bench Stone 300/1000 | included care tools | 300 and 1000 | 8 x 3 in | Mat, cleaning block and pouch | 7.7 |
| S SATC Diamond Stone 400/1000 | a 400/1000 pair | 400 and 1000 | 7.0 |
How should you choose the best diamond sharpening stone?
Choose by the condition of your knife edges, the finish you want and how much room you have to work. A coarse-and-fine plate handles common sharpening in two stages, while a set adds a middle step and a single-grit stone fills one specific need.
What grit is best for kitchen knives?
A coarse face around 300 to 400 grit can set an edge or address a dull blade. A face around 1000 to 1200 grit can refine it, while a 600 grit stone provides a middle stage.
Grit numbers do not always compare directly across brands. Our whetstone numbers guide explains how to think about grit ranges and labels.
Should you buy one grit, two faces or three stones?
Buy one grit if you already own the other stages or want a plate for one clearly defined job. A two-face plate is a practical first setup because it combines coarse sharpening and finer honing without requiring separate stones.
Choose a three-stone kit when you expect to repair very dull edges and want an intermediate stage before finishing. The tradeoff is a larger storage footprint and the need to swap stones as you work.
What size diamond plate suits your bench?
An 8 x 3 in plate gives you more working room for long strokes than a 6 in stone. A shorter plate saves space, but the reduced length may feel limiting with a long chef's knife.
Consider how the plate stays still, too. A non-slip pad, holder or rubber feet can make the setup more stable, while an angle guide can help you repeat a chosen angle.
Does a diamond stone need soaking or flattening?
Diamond plates don't need soaking, and their rigid surface doesn't require the flattening routine used for stones that dish with wear. Care still depends on the specific plate, so follow its directions for water, fluid and cleaning.
For water stones, see our guides to how long to soak a whetstone and how to flatten a whetstone. Those routines apply to stones that need soaking or flattening, not every sharpening surface.
How do you set up and use a diamond sharpening stone?
Start with a clean, stable work surface and place the plate so it cannot slide. If the stone includes a pad or feet, use them; if it does not, secure it with a suitable holder before sharpening.
Use the coarse face only when the edge needs significant sharpening, then move to a finer face to refine it. Keep your strokes controlled, maintain a consistent angle and use light pressure, especially on a coarse surface.
A guide can help you begin at a repeatable angle, but it doesn't replace steady, careful strokes. DMT's guide recommends 20 degrees for most edges, while SHARPAL's included guide offers four angle choices.
How do you care for a diamond plate?
Remove metal swarf from the surface as needed and follow the care directions for the particular stone. The DMT Dia-Sharp can be used dry or with water; SHARPAL advises dry sharpening for the 162N and 156N, and Trend recommends lapping fluid for best results.
Don't assume every diamond plate uses the same fluid or cleaning routine. The included cleaning block makes the Trend kit a useful choice if you want a dedicated care accessory in the package.
What common sharpening mistakes should you avoid?
Using too much pressure can make it harder to keep a steady angle and can remove more metal than needed. Start with light, controlled strokes, then check the edge before continuing.
Another common mistake is choosing a coarse face for every sharpening job. Coarse grit is useful for edge setting or repair, but routine upkeep may call for a finer surface and fewer sharpening strokes.
Which diamond sharpening stone should you choose?
Choose the SHARPAL 162N for a full-size two-grit setup with a pad and angle guide. Pick the DMT Deluxe or Ultra Sharp 8 x 3 in set if you want three stages, the Dia-Sharp if you need a fine face, or the 156N if bench space is tight.
If you're still weighing diamond against other stones, compare the options in our guide to the best knife sharpening stones. Start with the grit that matches the edge's condition, then finish with a finer face when the knife needs refinement.
Are diamond sharpening stones good for kitchen knives?
Yes. Diamond stones sharpen kitchen knives and provide a flat plate that doesn't need flattening like a stone that dishes with wear.
A dual-grit model can cover edge setting and refinement without a separate stone for each stage. Choose the grit pairing based on the edge's condition and the finish you want.
What grit diamond stone should I use for kitchen knives?
A coarse face around 300 to 400 grit suits setting an edge or repairing a dull one. A finer face around 1000 to 1200 grit can refine the edge, with 600 grit serving as a middle step in a three-stone set.
Grit labels vary between brands, so consider the stated use and micron information when available. Use the coarsest face only when the edge needs that much work.
Do diamond sharpening stones need water?
It depends on the stone. The DMT Dia-Sharp can be used dry or with water, while SHARPAL advises dry sharpening for the 162N and 156N and against water during sharpening.
Follow the directions for your specific plate. Trend recommends using its lapping fluid for best results.
Can a diamond stone sharpen hard knife steel?
Diamond abrasives suit hard steels, and SHARPAL says the 162N can handle high-speed steel, carbide, ceramic and cubic boron nitride. Check the intended materials for the particular stone before using it on a blade or tool.
Use controlled strokes and light pressure, especially on a coarse face. This helps you keep the edge angle steady and limit unnecessary abrasion.
How do you choose between a single-grit plate and a set?
Choose one grit if you already own other stones or know which stage your setup needs. A set gives you more stages for coarse repair, intermediate sharpening and fine refinement, but takes more room and requires switching stones.
A dual-grit plate provides two faces in one tool. The SHARPAL 162N is the best fit here if you want that format with a pad and angle guide.
Our top 3 picks at a glance
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Frequently asked questions
Are diamond sharpening stones good for kitchen knives?
Yes. Diamond stones sharpen kitchen knives and stay flat without the flattening routine used for stones that wear down.
Choose a grit that matches the edge work you need, and use light pressure so you can control how much metal you remove.
A dual-grit plate is a practical starting point if you want both a coarse face and a finer face.
What grit diamond stone should I use for kitchen knives?
A coarse face around 300 to 400 grit can set an edge or address a dull blade, while a face around 1000 to 1200 grit can refine it. Grit labels vary by brand, so compare the intended use and micron information when available.
For a broader overview, see our whetstone grit chart.
Do diamond sharpening stones need water?
Some diamond plates can be used dry or with water, while SHARPAL advises dry sharpening for its 162N and 156N and against water during sharpening. Follow the directions for your particular stone, and clear metal swarf from the surface as needed.
You do not need oil for the DMT Dia-Sharp.
Can a diamond stone sharpen hard knife steel?
Diamond abrasives suit hard steels, and SHARPAL says its 162N handles high-speed steel, carbide, ceramic and cubic boron nitride. Check each stone's intended materials before choosing it for a specific blade.
Use controlled strokes and light pressure, especially on a coarse face.
How do I choose between a single-grit plate and a set?
Choose a single-grit plate if you already own other stones or need one specific stage. A 3-stone set gives you more control over coarse repair, medium sharpening and fine refinement, but takes more room and requires swapping stones.
For help comparing stone types, read our kitchen knife sharpening stone buyer's guide.
