Steel and aluminum carabiner
Steel carabiners were born in the early 1800s dedicated to it’s use within the war and work fields, while the diffusion of the actual climbing carabiner started only after the Second World War. The beginning happened in Italy and France, where the production of mountain carabiners of new materials began: light aluminum alloy (ergal). Since then, it’s development has continued with the introduction of new shapes (oval, pear, asymmetric, etc) and some new details, such as an automatic snap gate (quick opening carabiner).
Within our slackline world the most commonly used carabiners are the oval shaped ones, where load forces are equally distributed between both sides. The carabiner can connect your TENSIONING DEVICES (pulleys, brakes, etc.) or it can be used in a primitive pulley system. Commonly integrated into slackline sport as well are the steel carabiners, because of its high strength and resistance to repeated stress movements, as well as the aluminium carabiner for its extreme leightweight.
