Ansen Tools Grit Sharp AS-423 8 3/4-Inch Double Sided Diamond Diamond Sharpener Coarse/Fine with Compact Wooden Storage Box Double-sided (Coarse 300 grit - Fine 1000 grit) each side with monocrystalline advanced technology Coarse surface (300 grit) quickly sharpens worn edges and the fine surface (1000 grit) will 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 stores in a latched, compact wooden box