ITEM NAME:10pcs 4-10mm Ceramic Polishing Rotary Die Grinder for Polishing Cutting Description: High hardness, durable, not easy to wear. Abrasive cutting edge sharp, edges are maintain good. Convenient to grind, simple to use, safe and reliable. High working efficiency, perfect grinding effect and long using life. Mainly used for DIY grinding/polishing jade, wood, metal, and other materials. Size Chart: Size: 4-10mm / 0.15-0.39inch Package Includes: 10 Pieces Grinding Rotary Die Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.Thank you!.10 Pieces Grinding Rotary Die. Abrasive cutting edge sharp, edges are maintain good.