Nothing stays dull: The three-stage knife sharpener features a diamond grinding stone that smooths damaged blades before they regain their V-shape and are sharpened with tungsten steel in stage 2. The finishing touch is provided by the ceramic grinding stone, which polishes the blade and evens out any imperfections. Thanks to the anti-slip rubber coating, the three-stage knife sharpener stands firmly on the countertop, and the ergonomic handle ensures a pleasantly secure grip.