Class 4 pencil sharpener: manual pencil sharpeners are made of high quality stainless steel, the first stage is suitable for sharpening scissors and the second stage is suitable for coarsely sharpening tungsten steel blades; The third fine grinding is diamond coated; Fourth ceramic slot - precision polishing. Ergonomic design: Smart sharpener features a comfortable handle for maximum grip and is suitable for both right and left hand users. Robust, non-slip base for extremely high stability and safety. Ease of use: sharpening takes just a few seconds, meaning that the dull knife can be sharpened again quickly and efficiently. Range of uses: straight-edged steel kitchen knives and scissors, including knives with hardened steel blades. Wave knife not included Note: The data is manual measurement, please allow an error of 1-3cm, due to the difference between the light and the screen, there will be some certain color difference, the specific received in kind shall prevail.