Product durabilityKnife Sharpener is made of high-quality tungsten carbon steel, diamond rods, high-hardness ceramics. The main body is made of light and solid ABS plastic. Ergonomically design: With a non-slip rubber base and ergonomic wide handle, this Knife Sharpener is suitable for both right and left-handed users, which can bring us a good cooking experience. Due to the ultimate stability & safety of the heavy-duty non-slip rubber base. 4 Stage Manual SharpenerThree step sharpening process, (coarse, medium, fine) you can get every knife super sharp depending on the degree of wear. The Underside slot is for scissors. Slot 1,2,3 are then for rough grinding, fine grinding and polishing. It 's a fine cutting edge to make every blade from dull to razor sharp. Multi-functionalThe Professional knife sharpener is extremely effective and durable, for use straight edged steel kitchen knives, scissor and wide serrated knives (bread knives). including knives with hardened steel blades. Use it at home, outdoors or even on the road while camping. Instructions for use: When using the sharpening mouth to sharpen the scissors, hold the sharpener in your left hand and the scissors in your right hand (do not hold the scissors in your left hand), then open the scissors, put it in the sharpening mouth, clamp the sharpening rod with the scissors blade, and push forward evenly , Or as a normal cut item, clamp and pull back, repeat several times, remember not to grind back and forth. 1Which hole to use? 1. If your knife is very blunt, please use rough grinding 8-12 times first, then medium grinding for 8-12 times, and finally fine grinding for 5-8 times. 2. If your knife is blunt, first, medium grinding for 5-8 times, and then fine grinding for 5-8 times. 3. If your knife is only a little blunt, you can fine grind it 5-8 times. 2Instructions for use: When using the sharpening mouth to sharpen the scissors, hold the sharpener in your left hand and the scissors in your right hand (do not hold the scissors in your left hand), then open the scissors, put it in the sharpening mouth, clamp the sharpening rod with the scissors blade, and push forward evenly , Or as a normal cut item, clamp and pull back, repeat several times, remember not to grind back and forth. 3Specifications Product size: 19*5*9.5cm Product weight: 190g Material: ABS + stainless steel + tungsten steel + diamond + ceramic Color: white Package includes: 1pc* sharpener