- The material of the working cutting and shank is stainless steel of increased strength. - The allowable rotation speed is 300,000 rpm. - Very large variance (180 - 212 microns). - Type: Super Coarse. - Color: Black. - ISO: 173. - Diameter: 018. - Working: 10.3. - Overall Length: 21.9 **For further product information , please contact Chat support**