CARABINER Stainless Steel Quick Link Connectors Cable Chain 7-PC Set

1.5", 2.5" & 3.25" locking stainless steel locking carabiner clips Can hold up to 600 Lbs Max Load Rotate the thread to open, link what you need, and then reverse rotate to close, because each is made of all metal, so even a long time without rotation can be easy to operate, not easy to rust. Use one at a time or together. Make great keychains, hooks to hang off backpacks and shoulder bags, or even belt loops.