Cylinder Bur SA, Type Aluminum, Shank Dia. 1/4 in, Head Dia. 1/2 in, Head Length 1 in, Included Angle Not Applicable, Overall Length 2 in, Trade Number SA-5A, Head Shape Cylinder, Operating Speed - Maximum 50,000 RPM, List Number 881, Coating Bright (Uncoated), Head Material Carbide, Shank Material Hardened Steel