This professional, two stage Diamond Hone electric knife sharpener incorporates conical 100% diamond coated disks in Stage 1 and a revolutionary stropping/polishing disk in Stage 2, to create, in just seconds, an edge of unprecedented sharpness and durability on fine edge (straight edge) and serrated knives. Enjoy this new stropping/polishing technology that resharpens with less metal removal than conventional means, even less than sharpening steels. High precision angle guides eliminate all guesswork. Two-year limited warranty. Assembled in the U.S.A.