The DMT W250FCNB DuoSharp Bench Stone carries a fine and coarse grit diamond-coated surface across a 10-inch working face. DMT bonds industrial monocrystalline diamond directly to a precision-ground steel plate — no oil or water is required, and the plate stays flat for the life of the tool. The fine and coarse grit removes metal predictably without dishing or hollowing the way bonded-abrasive stones do as they wear.
This sharpener handles knife blades, kitchen edges, woodworking irons, garden tools, and outdoor cutting edges in the field or at the bench. The interrupted-surface design (where present) sheds swarf away from the abrasive so the diamonds keep cutting through long sharpening sessions. The 10-inch format gives plenty of working length to dress kitchen knives, chisels, plane irons, and garden tool edges in long uninterrupted strokes.
DMT (Diamond Machining Technology) has manufactured diamond sharpeners in Marlborough, Massachusetts since 1976 — the company’s listings carry the Made in USA designation per the manufacturer. The W250FCNB ships ready to work out of the package with no break-in or seasoning required. Pair with other DMT grits when you want to step from rough reshaping to a polished cutting edge in a single brand system.
