Combining electric and manual stages, this hybrid sharpener is the ideal solution for improved cutting performance on 20-degree class knives. Using 100 percent diamonds, the hardest natural substance on earth, our patented abrasives sharpen faster and easier to create an ultra-sharp, longer-lasting edge. The final stage delivers a polished finish. Precision angle control ensures accurate sharpening throughout the entire blade length. This unit is designed to work with both straight-edge and serrated knives. WHY YOU NEED A KNIFE SHARPENER - Over time, a knife's edge dulls under the stress of cutting. The overall performance can be significantly improved if sharpened and maintained correctly. HOW DO KNIFE SHARPENERS WORK - Good sharpening systems shape the knife edge with a coarse abrasive and polish with a finer abrasive. Covered by the Chef'sChoice Three-Year Limited Warranty. Base Material: 100% Plastic Care: Wipe Clean Country of Origin: Imported