The B-52 is a bomber belay-rappel device for sport, trad or alpine climbers. Friction is created by a camming action that is initiated by the pull of the rope during a fall or your weight while rappelling. When catching a fall, the B-52 pinches the rope against your locking biner smoothly and quickly for fast stops and secure lock offs... yet is easy to take in or pay out rope eliminating worries about "short roping" the leader. For advanced climbers and guides on mult-pitch routes, the B52 can also be rigged in "autoblock mode" for belaying your second directly to your anchors "power point.". CNC machined body with tough anodized finish and burly keeper wire with durable nylon sheath.