- The material of the working cutting part and shank is stainless steel of increased strength. - Very fine dispersion (20 - 30 microns). - Permissible rotation speed 300,000 rpm. - Type: Extra-Fine. - Color: Yellow. - ISO: 257. - Diameter: 012. - Working: 6.0. - Overall Length: 19.9. **For further product information, please contact Chat Support**