Sea-Dog Quick Links are reusable and removable chain connectors made from corrosion-resistant formed 304 stainless steel. These threaded quick links provide fast and secure connections between two lengths of chain or between chain and accessories such as shackles or gear. A hex-shaped bolt end allows for easy hand or tool operation, making them ideal for marine, industrial, and recreational applications. Common uses include chain repair, securing hammocks, rigging gear, and fastening gates or fences. Each size offers a strong working load and high breaking strength to meet a variety of needs. Part Number 153703: 1/8" size, A 1-3/8", B 7/16", C 1/8", D 3/16", breaking strength 2,000 lb, weight 0.02 lb Part Number 153705: 3/16" size, A 2", B 9/16", C 1/4", D 5/16", breaking strength 4,000 lb, weight 0.05 lb Part Number 153706: 1/4" size, A 2-5/16", B 5/8", C 9/32", D 3/8", breaking strength 6,750 lb, weight 0.08 lb Part Number 153708: 5/16" size, A 2-15/16", B 3/4", C 7/16", D 7