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