Ball Bur SD, Type Single, Shank Dia. 1/8 in, Head Dia. 1/8 in, Head Length 1/8 in, Included Angle Not Applicable, Overall Length 1 1/2 in, Trade Number SD-42, Head Shape Ball, Operating Speed - Maximum 80,000 RPM, List Number 900, Coating Bright (Uncoated), Head Material Carbide, Shank Material Carbide