Features: 1. 10pcs mounted handy suit shank diameter 3.17mm grinding metal rod.2. Unique sintering technology, excellent mosaic grip and grinding, does not fall off.3. High-quality materials forging grinding, grinding and durable than the average 30%. Specification: Type: Conical/Cylindrical Material: Corundum Diameter Size: 10mm/15mm Shank Diameter: 3.17mm Quantity: 10pcs Application: Mainly used DIY grinding, polishing/jade, jade, wood, metal, mold polishing, power tool matching. Package include: (Optional) 10pcs/set * conical rotary tool (10*3.17mm) or 10pcs/set * cylindrical rotary tool (10*3.17mm) or 10pcs/set * cylindrical rotary tool (15*3.17mm) Note: 1. The real color of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2. Please allow slight manual measurement deviation for the data.