Carbide Bur End Type Flat Cut Type Single Shank Dia 1/4 in Head Dia 7/16 in Head Length 1 in Included Angle Not Applicable Overall Length 2 3/4 in Trade Number SA-4 Primary Material Application Brass Bronze Cast Iron Zinc Head Shape Cylinder Operating Speed - Maximum 58 000 RPM List Number 1845 System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel