Cone Bur Cut Type Single Shank Dia 6 mm Head Dia 15 7/8 mm Included Angle 60 Degrees Overall Length 61 29/32 mm Trade Number SJ-6 Primary Material Application Cast Iron Ferrous Metals Non-Ferrous Metals Steel Operating Speed - Maximum 40 000 RPM Coating Bright (Uncoated) Head Material Carbide Head Material Grade C2 Submicron Shank Material Steel