- The material of the working cutting part and shank is stainless steel of increased strength. - Very coarse fineness (180 - 212 microns). - Permissible rotation speed 300,000 rpm. - Type: Super Coarse. - Color: Black. - ISO: 297. - Diameter: 016. - Working: 7.3. - Overall Length: 21.2. **For further product information, please contact Chat Support**