4-in-1 knife sharpener multi-purpose knife three-stage knife sharpening tool professional chef knife safe and convenient manual knife sharpener Four-in-one function: Our knife sharpening tool includes four functions: scissor tip, coarse sharpening, fine sharpening, and fine grinding. It can meet your daily knife sharpening, blade polishing, and fine-sharpening needs. High-quality materials: Our professional knife sharpener is made of stainless steel and ABS plastic, and the knife grooves are made of ceramic, carbide, and diamond grinding wheels. This knife sharpener has a long service life and can withstand the intense pressure generated during sharpening. Safe handle: The handle of this knife sharpener is ergonomically designed and covered with a soft rubberized plastic outer layer. It is scratch-resistant and non-slip, providing a strong grip while sharpening, safe and energy-saving. The compact design makes it easy to carry and store. Suitable knife types: This knife sharpener is suitable for most types of knives, such as chef's knives, utility knives, cold cutters, paring knives, and all other non-serrated blades. However, it is not suitable for ceramic knives or serrated knives. Easy to use: To use the sharpener, simply insert the blunt knife into the sharpener groove at a 90-degree angle and pull it several times in one direction (from base to tip). No special techniques are required to get the most out of your knife.