Product information: Product Name: Double face daimond knife sharpener Product Model: T0831D Usage: Kitchen tools,Outside tools,Garden toools Size: 180*89*36mm/ 7Inch * 3.51Inch * 1.4Inch Weight:270g Material:Daimond,ABS,PC,Stainless steel,rubber Product features 1. Excellent sharpening performance 2. Double sided diamond design as 360Grit for coarse sharpening & 600Grit for fine honing 3. Clear plastic cover protects the stone, molded plastic base with non-slip feet for safety 4. Oval hole design to collect and hold metal chippings. Cautions: 1. Do not use the knife sharpener to sharpen serrated blades. 2. It would be much better to use with sharpening oil or water 3. The diamond may discolor. This is normal. 4. Please don’t put sharpener in dishwasher or Water 5. Please put the knife sharpener and knife keep away the children,Avoid accidents!