The Edelrid HMS Bulletproof Triple Lock Carabiner is an innovative hybrid carabiner. It combines the benefits of an aluminum carabiner with those of a steel one. This is made possible by a steel insert in the carabiner’s vertex, which prevents premature wear and the formation of sharp edges. At the same time, the aluminum body minimizes the weight. It comes with a triple lock locking mechanism for maximum safety. H-profile construction ensures best possible use of material and minimal weight. Also makes a lighter alternative to a steel carabiner for top-roping.