● Woodworking · Review

DMT W6EFC Deluxe Diamond Professional Knife Sharpening Kit

Best diamond sharpening system. Its case rests on diamond surface never needs flattening, the flattest consistent sharpening surface and works dry or with water, no oil purchase or disposal. The tradeoff: higher upfront cost than waterstones or oilstones.

✎ PickHonest Research Desk▦ Updated July 31, 2026◷ 3 min read

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DMT W6EFC Deluxe Diamond Professional Knife Sharpening Kit
Best Diamond

DMT W6EFC Deluxe Diamond Professional Knife Sharpening Kit

DMT

Best diamond sharpening system. Its case rests on diamond surface never needs flattening, the flattest consistent sharpening surface and works dry or with water, no oil purchase or disposal. The tradeoff: higher upfront cost than waterstones or oilstones.

  • Extra fine, fine, and coarse diamond plates
  • Monocrystalline diamond surface
  • No oil or water required
  • Stays flat, no dressing needed

Pros

  • Diamond surface never needs flattening, the flattest consistent sharpening surface
  • Works dry or with water, no oil purchase or disposal
  • Monocrystalline diamonds outlast electroplated diamond plates significantly
  • Extra fine grit produces a very refined edge suitable for paring work

Cons

  • Higher upfront cost than waterstones or oilstones
  • Aggressive stock removal at coarse grit can overshoot the bevel angle if not careful
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