Tree Bur SF, End Type Radius, Type Aluminum, Shank Dia. 1/4 in, Head Dia. 3/8 in, Head Length 3/4 in, Included Angle Not Applicable, Overall Length 2 in, Trade Number SF-3A, Head Shape Tree, Operating Speed - Maximum 63,000 RPM, List Number 883, Coating Bright (Uncoated), Head Material Carbide, Shank Material Hardened Steel