Chef&rsquo;sChoice 4643 ProntoPro Diamond Hone Manual Knife Sharpener Extremely Fast Sharpening Euro-American and Asian Style Knives Precise Bevel Angle Control Diamond Abrasive Made in USA, 3-Stage, Silver Professional 3-stage sharpener for super sharp edges on your 15 and 20-degree class knives 100 percent diamond abrasives are used in all three stages. The initial stages sharpen and hone using 100 percent diamond abrasives while the third stage polishes the edge with micron sized diamond abrasives Sharpen straight edge and serrated knives as well as sports and pockets knives ChefsChoice advanced CrissCross sharpening technology delivers an extremely sharp edge by using diamond abrasive wheels which sharpen simultaneously for a superior burr-free edge that cuts effortlessly Precise bevel angle control creates ultra-sharp 15 and 20-degree edges Separate sharpening and honing/polishing stages for a razor sharp, arch-shaped edge that is stronger and more durable Features a Soft Touch comfortable handle for an easy and secure grip Compact and convenient Precise bevel angle control Diamond abrasive wheels CrissCross sharpening technology