The EverSharp electric knife sharpener provides an easy, automatic way to sharpen kitchen and sporting knives to a razor-sharp edge. With a professional two-stage system, it precision grinds a perfect sharpening angle then fine hones and polishes the edge. This Presto knife sharpener uses Sapphirite sharpening wheels, the same ultra-hard material used in professional sharpening shops. No-guess blade guides automatically hold knife at the ideal sharpening angle for perfect results every time.