The Coeur Pulse span style="white-space: pre; "from Petzl is a twelve-millimeter stainless steel bolt that you can set quickly and easily without tools or remove again to use it again. Its screw lock reduces the risk of it being pulled out unintentionally. The large, ergonomically shaped connecting eyelet makes it easy to attach the carabiners. It is large enough to attach two carabiners at the same time. The thick material layer of the latch and the rounded edges of the connecting eye protect the carabiners from wear. The temporary bolt; you also protect the environment by leaving no rusting bolts behind. Clean Climbing 2.0.