Easy, strong connection of chain to fittings or for repair. Use with proof coil (Grade 30) chain. Comes in two halves. Pins insert into opposite piece and is pined for security. Forged steel. Forged steel, heat treated, electro galvanized. Meets the performance reqirements of Federal Specification RR-C-27 1D, Type II. Available in Sizes 1/4" (WLL 1250 Lbs.), 5/16" (WLL 1900 Lbs.), 3/8" (WLL 2650 Lbs.) and 1/2" (WLL 4500 Lbs.). Warning: DO NOT exceed working load limit (WLL) of the Connecting Links.