Material Tungsten Carbide Grit type Fine About this item 1.4in1, new Upgraded4-stage sharpening system. The 1st slot: diamonds wheel grinding, for small knives, paring fruit, utility knives. The 2nd slot: tungsten steel grindin, for grinding very blunt tools. The 3rd slot: ceramic fine grinding, for finishing and polishing knife edges. The 4th slot: scissors fine grinding, for sharpening scissors. 2.Exclusive professional design Ergonomic handle designed, suitable for left or right hand use, the base is covered with a high quality mat to prevent slipping, work safely. The sharpener can be easily used on any flat surface in your kitchen. 3.Great for all your kitchen knivesmust-have knife sharpener for home kitchen, for steak knives, slicing knives, fruit knives, paring fruit, utility knives, chef knives, cleaver, scissors, etc. 4.High-quality materialswith durable ABS plastic, diamond and stainless steel. It is light and easy to use, ensures efficient and sharp sharpening of dull knives and tools. Sustainable use.