Cone Bur, End Type Pointed, Type Double, Shank Dia. 1/4 in, Head Dia. 3/8 in, Head Length 5/8 in, Included Angle 28 Degrees , Overall Length 2 in, Trade Number SM-4, Head Shape Cone, Operating Speed - Maximum 63,000 RPM, List Number 805, Coating Bright (Uncoated), Head Material Carbide, Shank Material Hardened Steel