With the triangular retractable Tefal Ice Force knife sharpener, you can maintain and repair stainless steel knives, keeping their cutting power always optimal. The sharpening process is three-stage: in the first stage, diamond rods repair and straighten the blade by reshaping its cutting edge. In the second stage, a Japanese ceramic grinding wheel further straightens and polishes the blade, and in the third stage, ceramic rods remove any remaining irregularities. The easy-to-use and anti-slip design ensures safe and consistent usage, and the retractable cover makes it easy to store the sharpener compactly in the kitchen. RESTORE YOUR KNIVES' SHARPNESS: Repair, sharpen, and polish your stainless steel knives to restore their optimal cutting performance THREE-STAGE SHARPENING WITH HIGH-QUALITY JAPANESE CERAMIC GRINDING WHEEL: Diamond rods repair and straighten the blade by reshaping its cutting edge.