3-In-1 Design Knife Sharpener The Tool Offers You 3 Levels. No.1 Diamond Sharpening Rod for Coarse Grinding, No.2 Solid Tungsten Steel Disc for Repairs, No.3 Special Ceramic Rod for Fine Grinding and Polishing. Because Even Old Blunt Knives Can Be Sharpened Like New Again Thanks To The 3 Levels. . Scientific Design Manual Knife Sharpener Is Made of High Quality Abs Material. With The Ergonomic Handle, Your Hands Will Protect From Friction, Your Hands From Being Cut. There Are Non-Slip Silicone Pads At The Bottom of The Sharpening Head and Handle To Prevent Knife Slipping When Sharpening. . Easy To Use and Clean One Hand Holds The Handle of The Knife Sharpener, The Other Hand Holds The Handle of The Knife. Push Down With Appropriate Force and Pull The Knife Back Repeatedly. The Detachable Sharpener Head Allows for Easy Cleaning of The Sharpener After Use. . Friendly Tips Not for Use With Ceramic Knives, Scissors or Knives With Finely Serrated Blades. Do Not Use Excessive and Strong Force, Do Not Pull Back and Forth.