Shackles - Multi-use: Type - Anchor; Size - Nominal - 5/16 in; Size - Opening - 0.53 in; Size - ID Max - 0.84 in; Pin Diameter - 0.38 in; Pin Type - Screw Pin; Material - Forged Steel; Finish - Galvanized, Blue Bolt; Working Load - 0.750 ton; Weight Each - 0.18 lb; Listings - RR-C-271, Type IVA, Grade A, Class 2; Manufacturer Series - Campbell 419-G