Chef'sChoice® Diamond Hone® Sharp-N-Hone® #325: This professional electric knife sharpener incorporates 100% diamond abrasive disks in Stage 1 and revolutionary flexible polymer stropping disks in Stage 2 to sharpen and polish straight edge, serrated and single bevel Asian style kitchen knives to hair-splitting sharpness in seconds. It is safe for all alloys and never detempers. The user friendly knife sharpening system features a powerful motor, patented 2-Stage sharpening, precision angle guides and a built-in abrasive cleaning mechanism. Easy to use. Recommended for smaller commercial kitchens. Ninety (90) day limited warranty. NSF certified. UL or ETL and Canadian Approval. Engineered and assembled in the U.S.A.