Ansen Tools Grit Sharp AS-406 8-5/8 -Inch Double-Sided Diamond Whetstone 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 damaged or dull edge. The fine diamond surface allows you to polish and hone to an extra fine edge Quickly sharpens the toughest materials including tool steel, carbide, titanium and ceramics Two stage sharpening ideal for cutlery knives, woodworking tools, garden tools and machine tools The sharpener comes with a non-skid rubber base