Inverted Cone Bur End Type Flat Cut Type Double Shank Dia 6 mm Head Dia 16 mm Head Length 19 mm Included Angle 18 Degrees Overall Length 50 mm Trade Number SN-6 Head Shape Inverted Cone Operating Speed - Maximum 40 000 RPM List Number 852 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel