Cone Bur End Type Radius Cut Type Double Shank Dia 1/4 in Head Dia 5/16 in Head Length 7/8 in Included Angle 14 Degrees Overall Length 2 in Trade Number SL-2 Head Shape Cone Operating Speed - Maximum 65 000 RPM List Number 807 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel