4 SLOTS MEET your SHARPENING NEEDS: Knife sharpeners: Scissor slot is suitable for Scissors daily sharpening. Coarse slot for grinding blunt knives. Fine slot for daily sharpening and also for the preparation stage of grinding knives. Exact-grinding slot for meticulous grinding and polishing. PREMIUM & DURABLE: Our manual knife sharpeners featuring ABS plastic body and superior quality blade slots made from ceramic, tungsten steel and diamond grinding wheel, Our knife sharpener have a longer service life, and also can fully withstand the pressure generated during sharpening. EASY-TO-USE: The knife sharpener simply insert the dull blade into the slot at a 90-degree angle to the sharpener and pull the knife through a few times in single direction (from base to tip). Turn your blunt knife into your sharpest, most reliable cooking friend SUITABLE FOR MOST TYPES OF KNIVES: Effectively use this kitchen knife sharpener for nearly any type of smooth blade. Suitable for most kitchen knives like your chef knife, slicer knife, utility knife, paring knife or any other non-serrated blade. SAFE & COMPACT: Designed with a non-slip silicone base at the bottom and ergonomic handle, it is not easy to slide for good grip when sharpening, safe and labor-saving. The compact design allows you to conveniently carry and store it which won't take up too much space in your kitchen.