Carbide Bur, End Type Radius, Type Double, Shank Dia. 1/4 in, Head Dia. 3/8 in, Head Length 5/16 in, Included Angle Not Applicable, Overall Length 3 1/16 in, Trade Number SD-3, Primary Material Application Brass, Bronze, Carbon Steel, Cast Iron, Copper, Stainless Steel, Steel, Titanium, Head Shape Ball, Operating Speed - Maximum 60,000 RPM, List Number 310D, System of Measurement Inch, Coating Bright (Uncoated), Head Material Carbide, Head Material Grade C2 Submicron, Shank Material Steel