Inverted Cone Bur End Type Flat Cut Type Double Shank Dia 3 mm Head Dia 3 mm Head Length 5 mm Included Angle 10 Degrees Overall Length 38 mm Trade Number SN-42 Head Shape Inverted Cone Operating Speed - Maximum 80 000 RPM List Number 800 Coating Bright (Uncoated) Head Material Carbide Shank Material Carbide