ArkHardware 1/4" Quick Link Screw Threaded Locking Carabiner Wire Rope Cable Connector Keychain Buckle Stainless Steel Type 316 Commercial Marine Grade (1/4"- 10 pieces) 1 Order= 10 pieces Quick Link .Screw Threaded Locking. SIZE: A=1/4", D(opening)=5/16", B= 1-3/4", C=9/16", WT=0.08LB.WLL=1500 LBS. OVERALL LENGTH =5.73 cm Quick Links are always slightly undersized. Most people order 1 size larger if it is used for Chain Stainless Steel Type 316 Commercial Marine Grade excellent for Indoor and Outdoor. Superior strength & rust resistance over grade 304, Galvanized and Cast Iron. Strong and durable.