Whetstones · Diamond plates · Natural stones
A sharper edge,
measured in grit.
Water stones, diamond plates and natural Arkansas stones — graded, lapped flat and made to keep your tools sharp for years.
Current offers
Welcome
Use code JOIN10 for 10% off full-price items — one use per customer.
JOIN10
Spend & save
Spend $175 on full-price items and save $10; spend $350 and save $30 — applied automatically at checkout.
Until Nov 15
Limited time: 15% off full-price diamond plates for 10 days — no code needed.
Shop by stone
Grit, measured
Which grit does what?
Lower numbers cut faster; higher numbers polish finer. Most edges need a medium stone to sharpen and a fine one to finish.
Coarse · cuts fastFine · polishes
- 1 Coarse#220–#400 Repairs chips and reshapes a worn or damaged edge. Use it only when a medium stone is too slow. Shop →
- 2 Medium#1000 The everyday stone, where most sharpening happens. Start here if you buy one stone. Shop →
- 3 Fine#3000–#6000 Refines a #1000 edge to a keen, smooth finish that lasts longer between sessions. Shop →
- 4 Polish#8000–#12000 A near-mirror polish for hard steel and woodworking tools. Natural Arkansas stones finish here too. Shop →
Which stone for which job?
Most people need two stones: a medium one to sharpen and a fine one to finish.
No. 1 · Everyday sharpening
Combination #1000/#6000
A medium side to sharpen and a fine side to finish, on one stone.
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No. 2 · Very dull or chipped edges
Mizu #220 or #400
Coarse stones remove metal quickly so a medium stone can take over.
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No. 3 · No time to soak
Kasumi splash stones
Splash with water and start — no 15-minute bath first.
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No. 4 · Hard steels & flattening
Kongo diamond plates
Diamond cuts very hard steel and keeps your water stones flat.
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No. 5 · A traditional finish
Arkansas stones
Natural novaculite used with oil or water for a fine, even edge.
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No. 6 · Starting from scratch
A sharpening kit
Matched grits, a holder and a flattener in one box.
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Keep your stones flat
- Soak or splash, never drySoaking stones need 10–15 minutes in water; splash-and-go stones just a wet surface.
- Flatten every few sessionsA dished stone rounds the edge you are trying to keep straight.
- Keep the surface cleanRinse off swarf, and use a nagura to clear glazing on fine stones.
- Dry slowly, store flatAir-dry at room temperature, away from heat and frost, so the stone doesn't crack.
Sharpening kits
The fine print, up front
Applies to every order- Dispatch
- 1–3 business days
- Every order ships with tracking.
- Delivery
- US 5–10 days
- Business days after dispatch. UK 5–9 · EU 7–12 · Canada 7–14 · Australia & NZ 7–15 · rest of world 10–20.
- Returns
- 30 days
- Unused stones, not soaked or wetted, in their original packaging. Returns & Refund Policy
- Warranty
- 1 year
- Against cracks and defects in materials and workmanship.
Not sure where to start?
Tell us what you sharpen and how often, and we'll suggest the stones.