Ball Bur SD, Cut Type Single, Shank Dia. 1/4 in, Head Dia. 1 in, Head Length 1 in, Included Angle Not Applicable, Overall Length 2-11/16 in, Trade Number SD-9, Primary Material Application Cast Iron, Non-Ferrous Metals, Steel, Head Shape Ball, Operating Speed - Maximum 25,000 RPM, Coating Bright (Uncoated), Head Material Carbide, Head Material Grade C2 Submicron, Shank Material Steel