Compact versatility: The roller carabiner

For years I’ve repurposed climbing gear, both my no-longer-used stuff and new equipment, for travel duty—especially for load-control purposes. For example, quick-draw slings are perfect for temporary attachment points on roof racks, trailers, and truck beds, from which I can create a criss-cross web of rope perfectly suited to the load. By threading the rope through carabiners attached to the slings I can tension the system simply by pulling on one end. Since slings and carabiners generally have an MBS (minimum breaking strength) north of 20 Kn or 4,500 pounds, they’re capable of safely securing virtually any load.

The same equipment can be used for hanging food out of bear reach, hoisting tarps or awnings or portable shower stalls—dozens of uses. You can rig the stoutest clothesline on the planet. And of course, if necessary, carabiners and slings comprise part of a rescue system to retrieve persons stranded on a cliff or in fast-moving water.

Recently I discovered the roller carabiner, available from Petzl as well as the Welsh company DMM, among others. At first glance it looks like an ordinary carabiner, until you notice the roller incorporated in one end, which transforms the carabiner into an ultra-compact pulley. Suddenly all the tasks that involve tightening or tensioning a rope laced through carabiners become nearly effortless.

In fact, given the strength and force-multiplication characteristics of the roller carabiner, I could envision using it in certain vehicle-recovery situations, for example—using the correct rope—as rigging to stabilize a vehicle tipping hazardously, while a winch recovery is arranged. The roller carabiner certainly won’t substitute for a proper, full-size pulley block or other heavy-duty pulley, but given the compactness and light weight having a few in the kit might prove extremely useful.