Cone Bur Cut Type Single Shank Dia 6 mm Head Dia 12 45/64 mm Head Length 6 11/32 mm Included Angle 90 Degrees Overall Length 57 29/32 mm Trade Number SK-5 Primary Material Application Cast Iron Ferrous Metals Non-Ferrous Metals Steel Operating Speed - Maximum 50 000 RPM Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel