Ansen Tools Grit Sharp AS-414  Premier Fold-Up Double-Sided Diamond Whetstone Sharpener Fine/Extra Fine Double-sided (Fine 600 grit - Extra-fine 1200 grit) each with monocrystalline advanced technology The fine diamond surface will bring up a razor sharp edge and the extra-fine surface will polish and hone to desired sharpness Compact and lightweight handles fold to protect the diamond whetstone sharpener when not in use Sharpen dry or with water Ideal for the toughest materials. Will sharpen all types of cutlery knives, woodworking tools, garden tools and machine tools