Cylinder Bur SB End Type Flat Cut Type Single Shank Dia 1/8 in Head Dia 1/4 in Head Length 3/16 in Included Angle Not Applicable Overall Length 1 11/16 in Trade Number SB-51 Head Shape Cylinder Operating Speed - Maximum 70 000 RPM List Number 915 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel