Inverted Cone Bur End Type Flat Cut Type Single Shank Dia 3 mm Head Dia 6 11/32 mm Head Length 6 11/32 mm Included Angle 10 Degrees Overall Length 38 mm Trade Number SN-51 Head Shape Inverted Cone Operating Speed - Maximum 70 000 RPM List Number 915 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel