?4 in 1 Multifunction Knife Sharpener? Knife sharpening function includes coarse grinding, fine grinding and polishing. You can sharpen each dull knife according to the degree of wear. It also includes a groove to sharpen the scissors. ?Non-slip silicone base? Non-slip base ensures maximum stability and safety, preventing the sharpener from slipping. It can be used on any flat surface in the kitchen. ?Easy to use? Simply place the blade in each of the grooves and gently pull several times for fast and efficient sharpening. The handle is ergonomically shaped for maximum grip, suitable for right-handed users and left-handers. ?Comfortable and durable material? The sharpener combines 304 grade stainless steel with high grade ABS plastic to ensure touch and health. The material of the sharpening piece is tungsten carbon steel, ceramic stone and diamond rods. With the ergonomic sharpener handle you will get a sharp knife in the shortest time without much effort. ?Fits most knives and scissors? For sharpening ham knives, chopping knives, pocket knives, sausage knives, chef knives, steak knives, steel knives, diamond knives, fishing knives, scissors, kitchen scissors of any size. Product description Professional 4 in 1 knife sharpener 1. Sharpen the scissors: Open the scissors, put them in the sharpening mouth, apply even force to move forward and squeeze the back firmly as if you are cutting something normally, and repeat several times. 2. Raw grinding: Using high hardness tungsten steel alloy, you can easily grind steel shavings, shape and repair the blade quickly, suitable for dull knife repair. 3. Fine grinding: Using 600 # diamond, with high strength polishing force, suitable for polishing dull knives (diamonds are synthetic diamonds) 4. Polished grinding: Using aviation ceramic materials, the texture is smooth and delicate, which is used to remove burrs from the edge. It is sharpened once a week and looks new (it is normal for ceramic grinding wheels to darken after use). How to use it? Put the knife vertically in the knife slot, move it 3-5 times in one direction. Insert the scissors into the slit of the knife, squeeze the scissors, and slowly pull the scissors out. Repeat 3 to 5 times. Slightly dull: use the fine grinding hole no. 4 to grind 10 times (grind once a week to keep knives sharp). Blunt (not good for cutting lean meat): use the fine grind hole n. 3 to grind 10 times, then use the fine grinding hole # 4 to grind 10 times. Very dull (not easy to cut fruits and vegetables): Ask the man to grind 20 times with the coarse grinding hole n. 2 (you can grind steel shavings, which are close to the cutting edge), then use the No. 3 fine grinding hole to grind 20 times, then use # 4 Fine polishing the hole is enough for 10 times.