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DMT D6FC 6-Inch Dia-Sharp Double-Sided Diamond Stone Fine

By DMT · Knife Sharpening · Kitchen & Cooking · More from DMT

  • 6-inch length
  • Fine (25 micron / 600 mesh) and coarse (45 micron / 325 mesh) sides
  • Double-sided
  • Made in USA
  • Non-skid mat included

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Summary

A compact double-sided diamond bench stone that pairs a Coarse face for repairing an edge with a Fine face for finishing it, aimed at cooks and woodworkers who want flat, maintenance-free sharpening without oil. Check the packaging before you buy: the double-sided models ship without the non-skid rubber feet that DMT puts on its single-sided stones.

Strengths

  • Two grits on one plate: coarse to restore an edge, fine to finish it.
  • The diamond surface cuts fast, and owners describe edges coming up razor-sharp.
  • The plate is ground flat and DMT says it stays that way; no re-flattening needed.
  • No oil required: use it dry or with water.
  • Works on kitchen knives, chisels, plane blades and utility knives.
  • Made in the USA, which reviewers repeatedly bring up.

Weaknesses

  • No non-skid feet on the double-sided model, so the stone can slide on a smooth bench.
  • At 6 inches it is shorter than the 8-inch size sharpening suppliers recommend for general use.
  • The 0.25-inch profile is thin; one owner wanted it to sit taller for hand clearance.
  • One owner reports current production is less durable than older DMT stones, a single signal.
  • The stone contains nickel and carries a California Proposition 65 warning.
  • It costs more than basic oil stones, and the premium buys the DMT name and US build.

Verified specifications

ModelD6FC.
BrandDMT (Diamond Machining Technology).
Grit sidesCoarse at 45 micron / 325 mesh on one face, Fine at 25 micron / 600 mesh on the other.
Dimensions6 × 2 × 0.25 in (15.24 × 5.08 × 0.64 cm).
Weightapproximately 0.86 lbs (0.39 kg).
Abrasivecontinuous monocrystalline diamond on a nickel-plated steel backing.
Lubricationdry or with water; no oil required.
Originmade in the USA.
Markingthe grit is marked on each side of the stone.
Full research notes and sources

Sharpening performance

The Coarse (45 micron / 325 mesh) side is for bringing back a neglected edge, and the Fine (25 micron / 600 mesh) side is for finishing. He used soapy water as lubricant and added a rust inhibitor.

No instrumented, independent test of this exact 6-inch model turned up. The evidence is hands-on: owners in Home Depot and Reddit threads describe diamond cutting as faster than oil stones or water stones, and the finish as sharp. DMT designs the surface to stay flat, so you do not re-flatten it the way you would a water stone.

Base, size and handling

The double-sided D6FC ships without non-skid rubber feet. DMT’s own catalog lists rubber feet for the single-sided models and leaves them off the double-sided ones, and a European retailer states plainly that every model except the double-sided ones has non-slip feet. In practice the stone can slide on a smooth bench unless you set it on a holder or a mat.

The stone is 6 inches long and 0.25 inches thick. One owner found the thin profile awkward to hold and wanted it to sit taller for hand clearance.

Maintenance, warranty and cost

DMT says its diamond sharpeners last several years when kept clean and stored dry, and that they do not last forever. A retailer’s buying guide warns that dry use can shorten stone life. Maintenance is just wiping the surface; the Highland Woodworking tester cleaned metal sludge off his plates with scouring powder. When the diamond wears out there is nothing to repair, and the stone is replaced.

Warranty terms vary by region. The European distributor lists a lifetime warranty on materials and manufacturing defects, but no US-specific statement was found, so confirm the terms where you buy. On cost, DMT lists the D6FC at $75.99 from its own shop, and Sharpening Supplies lists it at $59.99, marked down from $75.99. Home Depot lists it in the $34-38 range, and Carbatec lists it at $149.00 AUD. Running costs are minimal: no oil, no flattening, no replacement parts.

Which model this is

This page covers the DMT D6FC, the 6-inch double-sided Dia-Sharp bench stone with a Coarse face and a Fine face. DMT’s catalog identifies it as SKU D6FC, 6 x 2, Fine over Coarse, two sides and two grits.

Do not confuse it with the single-sided D6F (fine), D6C (coarse) or D6X (extra-coarse), or with the other double-sided plates, D6EF (extra-fine / fine) and D6FX (fine / extra-coarse), which use different grit pairs.

The US listing for this exact model is ASIN B000GD8WHY.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Stores:

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