Inverted Cone Bur End Type Flat Cut Type Double Shank Dia 6 mm Head Dia 19 mm Head Length 16 mm Included Angle 30 Degrees Overall Length 50 mm Trade Number SN-7 Head Shape Inverted Cone Operating Speed - Maximum 30 000 RPM List Number 852 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel