Carbide Bur End Type Radius Cut Type Single Shank Dia 1/4 in Head Dia 1/4 in Head Length 5/8 in Included Angle 14 Degrees Overall Length 6 5/8 in Trade Number SL-1L6 Primary Material Application Cast Iron Ferrous Metals Non-Ferrous Metals Steel Head Shape Cone Operating Speed - Maximum 70 000 RPM List Number 1852 System of Measurement Inch Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel