Cone Bur End Type Radius Cut Type Double Shank Dia 1/4 in Head Dia 3/8 in Head Length 1 1/16 in Included Angle 14 Degrees Overall Length 2 in Trade Number SL-3 Head Shape Cone Operating Speed - Maximum 63 000 RPM List Number 807 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel