This is one of the fastest, easiest, and most effective ways of sharpening. DMT Diamond DIA-Sharp X-Fine Grit Sharpener. This is a 6″ x 2″ x 1/4″, X-Fine/Fine double-sided benchstone. The DMT ensures maximum performance in diamond coverage, uniformity and surface flatness and the grit is marked on the side of the stone. Use this Fine/X-Coarse DMT Diamond Sharpener for everyday sharpening needs, and to repair damaged edges and create a great edge!