1.Mounted wearable suit shank diameter 3mm grinding metal rod. 2.Unique sintering technology, perfect mosaic shank and grinding, not falling. 3. Designed with cylindrical/bullet head and metal shank. 4.Uses: mainly used DIY grinding, polishing / jade, jade, wood, metal, mold polishing, power tools matching. 5.Quality materials forging grinding, grinding and durable than the average 30%.