Fractional Diameter 21/32 Decimal Diameter 0.6562 Bolt Diameter 5/16 Neck Diameter 21/64 Number of Teeth 6 Overall Length 2 11/16 Shank Diameter 1/2 Tool Width 17/64 Undercut Length 39/64 Weight 0.16 lbs 272010Type 2720Stock: In Stock.$167.85 Category: 2720-F