Ansen Tools AS-464 Grit Sharp Premier 8-Inch Double Sided Diamond Sharpener Fine/Extra Fine with a Non-Skid Rubber Base Double-sided fine 600 grit-extra fine 1200 grit with advanced monocrystallinetechnology Guaranteed flat surface will provide years of constant service The fine diamond grit allows you to sharpen to a smooth and fine edge, while the extra fine diamond grit will polish and hone to razor sharpness Sharpens the toughest materials including tool steel, carbide, titanium and ceramics Two stage sharpening ideal for cutlery knives, woodworking tools, gardening tools and machine tools