Maintain et repair all types of stainless steel knives (except stainless steel serrated knives, ceramic knives nor cissors). Place the sharpener on a stable surface when using. Keep the knife in the middle of the slot and pull the knife along the blade from the tip to the heel slightly. Repeating this to-and-fro movement 3 times: to sharp in both directions. Wash the knife after sharpening.