Carbide 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 3 1/16 in Trade Number SL-6 Head Shape Cone Operating Speed - Maximum 40 000 RPM List Number 1852 System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel