Hight quality rubber head, designed with mandrel mounted metal shank.Mandrel diameter: 3-6mm; Head Diameter: Including 4mm, 6mm, 8mm, 10mm, 12mm.Head shaped: cylinder shaped and bullet shaped, different shape for a different job.Work great for various , metal, iron, jade, agate, glass, stone etc.Fit for Tool, Electric Drills, Electric Grinders or other Rotary Tools. Kemei provides you all types professional grinding tools, cut off wheels, contact us for more information. Technical Parameters: Product Name: abrasive grinding head Material: silicon carbide Bond: rubber Type: mounted point All size and types can be cutomized, please contact us for more.