Inverted Cone Bur End Type Flat Cut Type Single Shank Dia 1/4 in Head Dia 3/4 in Head Length 5/8 in Included Angle 30 Degrees Overall Length 2 in Trade Number SN-7 Head Shape Inverted Cone Operating Speed - Maximum 30 000 RPM List Number 952 Coating Bright (Uncoated) Head Material Carbide Shank Material Hardened Steel