Revo Belay DeviceThe REVO is the only automatically locking belay device which has a completely panic proof locking mechanism. Features a fully panic proof locking mechanism. It makes it impossible to override the locking mechanism, both during belaying and rappelling. Bi directional: the locking function works regardless of the rope direction. Intuitive belaying method, which requires no changes to standard belaying technique. No need for a specific locking karabiner.