Carbide Bur, End Type Radius, Cut Type Double, Shank Dia. 1/4 in, Head Dia. 3/8 in, Head Length 5/16 in, Included Angle Not Applicable, Overall Length 2 5/64 in, Trade Number SD-3, Primary Material Application Cast Iron, Ferrous Metals, Non-Ferrous Metals, Steel, Head Shape Ball, Shank Length 1 3/4 in, Operating Speed - Maximum 40,000 RPM, System of Measurement Inch, Coating Bright (Uncoated), Compatible Tool Type Die Grinder, Rotary Power Tool, Straight Grinder, Head Material Carbide