Cylinder Bur SA Cut Type Double Shank Dia 3 mm Head Dia 6 11/32 mm Head Length 12 mm Included Angle Not Applicable Overall Length 1 1/2 in Trade Number SA-51 Head Shape Cylinder Operating Speed - Maximum 80 000 RPM List Number 815 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel