Ansen Tools Grit Sharp AS-413  6" Double-Sided Diamond Sharpener Medium/Fine With Non-Skid Rubber Base Double-sided (Medium 400 grit - Fine 1000 grit) each with monocrystalline advanced technology Medium diamond surface will quickly restore a dull edge and the fine diamond surface allows you to polish and hone to an extra fine edge Will sharpen the toughest materials including tool steel, carbide and ceramics Two stage sharpening ideal for cutlery knives, woodworking tools, and machine tools The sharpener sits in a compact case with a non-skid rubber base