Carbide Bur End Type Flat Cut Type Double Shank Dia 1/4 in Head Dia 1/2 in Head Length 1/2 in Included Angle 28 Degrees Overall Length 2 1/4 in Trade Number SN-4 Primary Material Application Brass Bronze Copper Ferrous Metals Nickel Titanium Head Shape Inverted Cone Operating Speed - Maximum 16 000 RPM System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Shank Material Steel