DMT W250 diamond stone
The DMT W250 DuoSharp Diamond Stone is a premium 10-inch double-sided diamond bench sharpening stone designed for knives, skates, woodworking tools, scissors, axes, plane irons, chisels, and other edged tools. It is one of DMT's largest and most popular bench stones. (DMT Diamond Sharpeners)
Featured Product
DMT DuoSharp DIAMOND STONE 10" W250 2 sided
Large 10-inch double-sided diamond bench stone with fast-cutting monocrystalline diamond abrasive for knives and tools.
Key Specifications
Feature
Specification
Manufacturer: DMT (Diamond Machining Technology)
Model Series: W250 DuoSharpStone
Size: 10" × 4" × 3/8" (254 × 102 × 9.5 mm)
Abrasive: Micronized monocrystalline diamond
Sharpening Surface: Double-sided
Lubrication: Dry or water; no oil required
Country of Manufacture: USA
Intended Use: Knives, Skates,woodworking tools, garden tools, shears, machetes, cleavers, plane soles, chisels, etc.
Construction
The W250 uses DMT's patented DuoSharp® interrupted surface technology, featuring small recessed holes across the sharpening surface. These pockets collect metal swarf during sharpening while maintaining a large cutting surface and fast metal removal. The stone is manufactured on a precision-flat steel substrate to ensure consistent sharpening and flattening performance. (DMT Diamond Sharpeners)
Available Grit Combinations
The W250 is sold in several grit pairings:
Combination
Mesh: Micron: Extra-Coarse / Coarse220 / 32560 / 45 µmCoarse / Fine325 / 60045 / 25 µmExtra-Fine / Fine1200 / 6009 / 25 µmExtra-Extra-Fine / Extra-Fine8000 / 12003 / 9 µm
Advantages
- Very fast cutting compared with traditional water stones and oil stones.
- Remains flat over time; no flattening required.
- Large 10" × 4" surface accommodates long blades and woodworking tools.
- Can be used dry or with water.
- Durable diamond abrasive bonded to a rigid steel plate.
- Excellent for repairing damaged edges and re-establishing bevels. (DMT Diamond Sharpeners)
Typical Sharpening Progression
For knives:
- Extra-Coarse (220) — repair chips or reshape bevels.
- Coarse (325) — establish the primary edge.
- Fine (600) — refine and sharpen.
- Extra-Fine (1200) — polish and finish.
- Optional strap for a mirror edge.
Summary
The DMT W250 DuoSharp is a professional-grade, maintenance-free diamond sharpening stone that offers a large working surface, rapid metal removal, excellent flatness, and long service life. It is particularly valued by speed skaters, woodworkers, chefs, and serious knife enthusiasts who want consistent results without the maintenance requirements of water stones. (DMT Diamond Sharpeners)
MAP: $249