The non-slip rubber on the entire base of the Best Knife Sharpener ensures ultimate stability and safety which prevents the sharpener from slipping. Sharpens most steel ceramic knives quickly and easily. Use on flat and dry surfaces in kitchen, wood, stone or glass worktops. Knives are essential for making delicious dishes. However, the sharpness gradually deteriorates, in this case, the sharpness can be restored to a new sharpness by using a sharpener.Thanks to the safe and ergonomic design, the 4 in 1 Sharpening Tool provides you with a solid grip to keep the device calm and make the sharpening process safe. Straight kitchen knives made of steel and wide serrated knives (bread knives), including knives with blades made of hardened steel. Sharpen the v shape of the recoverable blade. In the final polishing, the blade can be polished cleanly. You can use scissors polishing to sharpen the scissors. Specifications: Material: Plastic Stainless Steel Colours: black, yellow-green, blue, black-red Product material: 304 stainless steel + ABS and TPR handle Package Content: 1 x knife sharpener  Note: 1. Solemnly declare that this sharpener is not suitable for serrated knives.2. Don't use too much force when sharpening the knife, let alone grinding back and forth, so as not to damage the blade.3. It is normal that the ceramic rods and metal blades in the sharpener may be contaminated.4. Do not put the sharpener in the dishwasher or water, keep it dry and clean