Presto 08800 EverSharp Electric Knife Sharpener The easy, automatic way to sharpen most kitchen and sporting knives to a razor sharp edge. Professional twostage system precision grinds a perfect sharpening angle then fine hones and polishes the edge. Uses Sapphirite sharpening wheels, the same ultrahard material used in professional sharpening shops. Noguess blade guides automatically hold knife at the ideal sharpening angle every time.