5/16″. Shank opening: 7/16″. Safe working load: 1,100 lbs. Break strength: 4,400 lbs. Hot dipped galvanized anchor shackles with screw pin assembly. Measured by pin thread. Anchor shackles make connecting and disconnecting from all sides of the shackle chain to an anchor easy while keeping it secure. Blister pack. Corrosion resistant.
