Chefs Choice M100 Knife Sharpener * Patented, 3-stage process for most kitchen and household knives of any brand * Not intended for serrated knives * 3-stage sharpening consists of pre-sharpening, sharpening and honing the blade, which creates a strong arch-shaped edge that lasts 2 to 3 times longer than conventional, V-shaped or hollow-ground edges but removes less metal than other sharpening methods * The pre-sharpen step makes sharpening faster * 100 percent diamond abrasives sharpen knives of any alloy, including carbon steel and stainless steel * Foolproof magnetic guides align the blade precisely and ensure the correct sharpening pressure * The diamond abrasives do not de-temper your knives; the blade"s hardness stays intact * Manufactured by EdgeCraft * Available online only * Model No. 0100000