Come and see our amazing products. You just need to put it on a smooth desktop and press the black switch. It will suck very strongly on the table. Then you can start to sharpen the knife. You don't need to hold it with your hands. Tungsten carbide blades for quick edge setting, Ceramic blades for fine honing, Special tungsten carbide blade for scissors grinding. 3 parts to meet all your sharpening needs. Pls confirm with us about the packing info, stock color and exact production time before placing your order.