Inverted Cone Bur End Type Flat Cut Type Double Shank Dia 1/4 in Head Dia 6 mm Head Length 8 mm Included Angle 10 Degrees Overall Length 50 mm Trade Number SN-1 Head Shape Inverted Cone Operating Speed - Maximum 70 000 RPM List Number 852 Coating Bright (Uncoated) Head Material Carbide Shank Material Carbide