Carbide Bur End Type Pointed Cut Type Double Shank Dia 1/4 in Head Dia 3/8 in Head Length 5/8 in Included Angle 28 Degrees Overall Length 2 1/2 in Trade Number SM-4 Primary Material Application Cast Iron Stainless Steel Steel Head Shape Cone 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 Head Material Grade YG7