Carbide Bur End Type Radius Cut Type Aluminum Shank Dia 1/4 in Head Dia 1/2 in Head Length 1 1/8 in Included Angle 14 Degrees Overall Length 3 in Trade Number SL-4 Head Shape Cone Operating Speed - Maximum 50 000 RPM List Number 1852 System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel