Inverted Cone Bur End Type Flat Cut Type Double Shank Dia 6 mm Head Dia 9 1/2 mm Head Length 9 1/2 mm Included Angle 13 Degrees Overall Length 50 mm Trade Number SN-2 Head Shape Inverted Cone Operating Speed - Maximum 63 000 RPM List Number 852 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel