a metal loop with a spring closure used to connect ropes in climbing and other activities

(n) an oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes

Metal rings with spring-loaded gates, used as connectors. Also known as crab or biner.

[Ger. karabiner-haken, "spring hook"] A metal ring having a latch ("gate"), used for attaching a rope to a harness or to a piton or other pro.

An oval shaped metal clip with a spring hinge. First designed for mountain climbing but now common among river runners. See Biner. Cataraft.

A clip, used to secure items into the boat, and to construct safety and rescue systems.

A metal link with a gate that can open and close, generally used for clipping ropes to anchors or other objects.