Samurai Shark Tungsten Carbide Steel Knife Sharpener Normally used for Dull Knifes, Best Choice for chef using. Dull knife blades can lead to slippage and injury and reduce efficiency State-of-the-art manufacturing for precision Kitchen, Home or Hunting blade sharpening. ERGONOMIC HANDLE: Designed for aesthetics and practicality. A must have for butchers, chefs, food processors, and anyone else using knives all day that need consistent resharpening