DMT DiaSharp Bench Stone DMT. This Knife Sharpener from the great people at DMT is a two sided diamond benchstone that measures 6" x 2" x 1/4". One side is fine grit and one side is extra coarse grit. Don't explore mother nature without the DMT DiaSharp Bench Stone Knife Sharpener. Features of DMT DiaSharp Bench Stone Knife Sharpener: Two sided diamond benchstone measures 6" x 2" x 1/4" One side is fine grit and one side is extra coarse grit Offers 12 square inches of continuous diamond surface on each side Girt is clearly marked on side of stone Ideal to repair damaged edges and create keen edges Hang packaged Package Contents: DMT DiaSharp Bench Stone DMT DMTD6FX: DiaSharp Bench Stone