Foredom Carbide Ball 1/8 inch Dia. 1/8 inch Shank 1 17/32 Inches Overall Length Style A-B-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.