in 1: The knife sharpener has three different grinding settings: coarse, fine, and precise, for optimal sharpening results. Convenient: The sensible design fits perfectly in the hand, and the rubberized surface prevents accidental slipping. Stable: The contact points of this high-quality knife sharpener are also rubberized, ensuring it sits firmly on the countertop without slipping. A great kitchen helper! Durable: The knife sharpener is made exclusively from high-quality, robust materials, ensuring a long service life. An absolutely reliable product for the highest demands, an excellent kitchen helper you won't want to be without! Caution: 1. Not suitable for serrated knives or scissors. 2. Do not push and pull your knife back and forth. Use only one direction. 3. Clean the sharpener after use and then wipe it dry. Clean the slots with a soft brush. 4. Do not wash the sharpener in the dishwasher. 5. The ceramic and metal blades may become black, which is normal. 6. Keep out of reach of children. 7. For slot 1, please sharpen carefully. If the knife is not blunt, please use slots 2 and 3 directly.