Multi-functional, professional and fast Knife Sharpener will perfect for your kitchen life. Specification: Material: Rugged ABS plastic, tungsten steel, diamonds abrasives, ceramics rod Color: Black Knife Sharpener Size: 20 x 4.5 x 7.3 cm Knife Sharpener with 3 Sharpening slot: 1.Rough Grinding (Tungsten Steel Slot) - used to sharpen blunt knives and damaged tools. 2.Fine Grinding (Diamond Coated Slot) - used to repair the gap of the blade. 3.Polished (Ceramic Rod Slot) - used to polish the tool and quickly repair it. How to sharpen your knife 1.Place the knife sharpener on a stable, flat surface. 2.Put the knife vertically into the appropriate sharpening slot. 3.Sharpen in same direction and repeat 3-5 times.DO NOT pull and push in the slot. Cleaning Knife Sharpener: Remove the head of the sharpener and wash it in water. Package include: 1x Knife Sharper