The knife sharpener with 3 stages with carbide, diamond and ceramic stones helps to restore a super sharp cutting edge to blunt knife blades that that have dulled with use.The ergonomic handle provides a comfortable and secure grip.The fixed stones angle provides correct sharpening every time.The silicone base prevent the sharpener from sliding during operation.Not suitable for serrated knives and scissors.Not suitable for dishwasher, cannot be soaked in water. After using the sharpener, rinse it with water and towel dry.