Carbide Bur End Type Radius Cut Type Aluminum Shank Dia 1/4 in Head Dia 3/8 in Head Length 3/4 in Included Angle Not Applicable Overall Length 2 1/2 in Trade Number SF-3NF Primary Material Application Zinc Head Shape Tree Operating Speed - Maximum 60 000 RPM List Number 310F System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel