Karabiner, also spelled carabiner, is a commonly used term in mountaineering, rock climbing, and other outdoor activities. It refers to a metal device with a spring-loaded gate used to connect ropes, webbing, and other gear to a harness or anchor point. Although karabiner is the most commonly used term, there are several synonyms that can be used to refer to this device. Some of these synonyms include snap hook, D-ring, hook, carabin, and quickdraw. Regardless of the term used, this device is an essential piece of equipment for anyone involved in outdoor activities that require rope work and safety gear.