[Durable Material] The grinding head is made of tungsten steel, diamond, and ceramics. It is specially designed for blunt knives and is durable. In a comfortable home, sharpen knives as quickly, simply and safely as a professional. [4-Stage Knife and Scissor Sharpeners] Repair and sharpen the blade/Fine grinding and polishing/Restore knife's V-shape. 30-degree Grinding angle, in line with the human mechanics' angle, easy to use and effortless. [Ergonomic Handle & Non-slip Base] This sharpener is easy to grip and comfortable to use, the non-slip bottom base ensures sharpening safety at all times. [Easy To Use] Simply put the dull blade on the sharpening slot and pull it backward for several times, you can sharpen a dull knife in seconds and enjoy a razor-sharp. HINT: In order to get the best effect out of this knife sharpener, please sharpen your knife with one direction only. Grinding scissors require you to find a suitable angle to avoid damage to the scissors. [Applicable Knife Type] This knife sharpener is a fast, effective sharpening tool for chef knife, scissors, fruit knife, slicing knife, paring knife, carving knife, boning knife, Chinese cleaver, Japanese style knife, etc.