Foredom Carbide Radius Cylinder 3/32 inch Dia. 7/16 inch Long 1/8 inch Shank 1 1/2 Inches Overall Length Style A-CR-1. Carbide bur with standard flutes are used for easy material removal and leave a smooth finish. These burs are ideal for use on hard wood and most metals including stainless steel steel alloys cast iron etc. 100000 RPM Max Speed. Made in USA.