Carbide Bur, End Type Radius, Type Aluminum, Shank Dia. 1/4 in, Head Dia. 3/4 in, Head Length 11/16 in, Included Angle Not Applicable, Overall Length 2 7/16 in, Trade Number SD-7NF, Primary Material Application Zinc, Head Shape Ball, Operating Speed - Maximum 35,000 RPM, List Number 310D, System of Measurement Inch, Coating Bright (Uncoated), Head Material Carbide, Head Material Grade C2 Submicron, Shank Material Steel