carabiner

noun

Etymology: Shortened from German Karabinerhaken (“carbine hook”), reflecting that such a link was used for gear slinging even before it was used for rock climbing.

1. A metal link with a gate that can open and close, generally used for clipping ropes to anchors or other objects or for slinging gear (equipment) on one's person.

   “A carrabeener (metal clasp used in rock climbing) inside the pipes was devised as a release out, a tactic lent to them by Greenpeace.”