Keep your knives sharp and cutting like new with the Chef'sChoice diamond ultrahone knife sharpener. This compact professional electric 2-stage knife sharpener sharpens both straight edge and serrated 20-degree class knives to better than factory edges, in just minutes. The 2-stage sharpening provides arch-shaped edges that are stronger and longer-lasting than hollow ground or conventional “V” edges. Stage 1 uses 100% fine diamond abrasives to create the first bevel and Stage 2 ultra-hones the edge using advanced micron size 100% diamond abrasives to complete the second bevel. The precisely formed conical diamond abrasive disks gently apply optimal sharpening pressure, guaranteed to never detemper the edge. Highly precise knife guides automatically position and stabilize the knife as you sharpen it for fast, foolproof results. It’s ideal for sharpening all types of knives, including kitchen, household, sporting and pocket knives. Engineered and assembled in the U.S.A.