An oblong metal ring with a spring clip; used in mountaineering to attach a rope to a piton or to connect two ropes WordNet 3.0 & Open English WordNet

A carabiner or karabiner, often shortened to biner or to crab, colloquially known as clip, is a specialized type of shackle, a metal loop with a spring-loaded gate used to quickly and reversibly connect components, most notably in safety-critical systems. Wikipedia

A circlip, also known as a C-clip, snap ring, or Jesus clip, is a type of fastener or retaining ring consisting of a semi-flexible metal ring with open ends that can be snapped into place into a machined groove on a dowel pin or other part to permit rotation but to prevent axial movement. Wikipedia

A rope connecting device Wikipedia Disambiguation

A semi-flexible metal ring fastener used to hold a pin in place Wikipedia Disambiguation

Shackle with a spring-loaded gate Wikidata

Type of retaining ring that must be elastically deformed in order to install or remove them and has holes or notches for a circlip tool to be inserted Wikidata

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

Metal link with a gate. Wiktionary (translation)

A type of fastener consisting of a semi-flexible metal ring with open ends which can be snapped into place. Wiktionary

Fastener consisting of a semi-flexible metal ring. Wiktionary (translation)

A circular spring, having a small break in its circumference, used as a fastener; a circlip. Wiktionary