AGPTEK 4 pack Quick Link Snap Hook Carabiner Connector Chain Screw Lock Clip For Swing Play Set Playground Swing Hanger Premium-grade quick links for chain/rope,cable connections; threaded-nut closure for added security. This Zink Plated Steel Carabiner has superior strength, excellent rust\corrosion resistance. Also it is great for fast connections with chains and trailer safety chains.Versatile binding, rigging and anchoring hardware allows fastest connection/disconnection This link allows you to attach two chains or cables without cutting. An easy-open threaded nut allows you to safety unlock and close. Lots of Uses. ( 37.4 mm, 93 mm, 15.4 mm)