Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. carabiner or karabiner is a metal loop with a sprung or screwed gate. The loop part opposite the gate is referred to as the spine. It can quickly and reversibly connect components in safety-critical systems. The word comes from "Karabinerhaken", meaning "hook for a carbine" in German. The term "carabiner" was not adopted as an English word for some time. According to Fergus Fleming's book on the beginning of alpinism, Killing Dragons: The conquest of the Alps, the early British climbers derided aids like carabiners, ice axes and crampons leaving their development to Italian, French and other alpinists. Carabiners are widely used in sports requiring ropework, such as climbing, slacklining, caving ("Single Rope Technique"), canyoning, sailing, and canoeing; and in industrial rope access work, such as construction or window cleaning.

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