2-Stage manual knife sharpener for all types of knives Double bevel for longer lasting sharp edge Interlocking diamond pad technology for uniformly polished edge Includes 2 ceramic rods for smooth cutting Designed to put a factory-sharp, precise edge on your straight, serrated, cleaver and sports knives The first stage hones each side of the edge with fine 100% diamond abrasives The second stage polishes the edge using ultra-fine 100% diamond abrasives Dizor engineered - two distinct facets set at different angles form a supportive double-bevel, arch-shape edge Proudly made in the USA Covered by the Chef'sChoice Two-Year Limited Warranty