Product information:Product Name: Double face daimond knife sharpenerProduct Model: T0831DUsage: Kitchen tools，Outside tools，Garden tooolsSize: 180*89*36mm/ 7Inch * 3.51Inch * 1.4InchWeight:270gMaterial:Daimond，ABS，PC，Stainless steel，rubberProduct features1. Excellent sharpening performance2. Double sided diamond design as 360Grit for coarse sharpening & 600Grit for fine honing3. Clear plastic cover protects the stone， molded plastic base with non-slip feet for safety4. 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 water3. The diamond may discolor. This is normal.4. Please don’t put sharpener in dishwasher or Water5. Please put the knife sharpener and knife keep away the children，Avoid accidents!