Professional Knife Sharpener Quick Professional 3-Stages Sharpener Professional Knife Sharpener- Quick Professional 3 Stages Sharpener. Features: 1. High-quality Stainless Steel and ABS Plastic. 2. Innovative 3-stage Sharpening System. 3. Safe to Use and Easy to Clean. 4. Sleek and Modern Stainless Steel Finish. 5. Suitable for Any Sizes of Kitchen Knives. How Does It Work Step one: Slot 1 Rough Grinding (Tungsten steel rod) is use for bluntknives, to coarsely sharpen and restorethe V-shape cutting edge, pull back (one -direction) several times. Step two: Slot 2 Fine Grinding (Diamond rodTo make the blade sharp, repair scratches on the blade, pull back (one -direction) several times. Step three: Slot 3, Polishing Grinding (Ceramic rod): To finely sharpen,polish and eliminate burrs on the blade, pull back (one -direction) several times. CAUTION: 1. Not Used for Serrated Knives or Scissors. 2. Please Sharpen the Knife Slightly in Case of Damage. 3. After Use, Please Clean the Sharpener and then Wipe Dry. 4. Don't Put the Sharpener in Dishwasher or Soak It in Water. 5. Keep the Knife and Sharpener out of the Reach of Children. 6. One Direction ONLY. Do Not Pull the Knife Backward and Forward Delivery Quantity: 1pcs Product color: black Product size: 18.5*4*8cm