This knife sharpener provides the 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. The EverSharp uses Sapphirite sharpening wheels-the same ultrahard material used in professional sharpening shops. No-guess blade guides automatically hold knife at the ideal sharpening angle every time.