Chef"s Choice Knife Sharpener, Black: * Orbiting motion hones to true razor sharpness * Uses diamonds as the abrasive * Will not de-temper quality knives * Magnetic guides hold knife at proper sharpening angle * Sharpens household carbon, stainless or alloy non-serrated knives * Trizor edge * Dimensions: 9"W x 3.5"L x 4"H