Cone Bur End Type Radius Cut Type Aluminum Shank Dia 1/4 in Head Dia 5/8 in Head Length 1 5/16 in Included Angle 14 Degrees Overall Length 2 in Trade Number SL-6A Head Shape Cone Operating Speed - Maximum 40 000 RPM List Number 887 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel