Carbide Bur End Type Radius Cut Type Aluminum Shank Dia 1/4 in Head Dia 3/8 in Head Length 1 1/16 in Included Angle 14 Degrees Overall Length 2 13/16 in Trade Number SL-3NF Primary Material Application Zinc Head Shape Cone Operating Speed - Maximum 60 000 RPM List Number 310L System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel