The Presto 08800 EverSharp Electronic Knife Sharpener is the fast and easy way to sharpen kitchen and sporting knives. It's equipped with a professional two-stage sharpening system. Stage one grinds the blade edge to a precision angle. Stage two fine hones and polishes for a razor sharp edge. No-guess blade guides automatically hold the knife at the perfect sharpening angle. Sapphirite sharpening wheels are made of the same ultra-hard material used by professional sharpening shops.