The Lift Rope Clamp is an extremely compact and lightweight ascender that is very rope-friendly because it has no teeth or cam. It operates by pivoting the rope around a lever when weighted. Simply open the rotating side plate, insert the rope and close the plate, clip a carabiner in the hole, and start climbing. CE certified, this lift is the perfect tool for rock climbing, alpinism or general mountaineering. Carabiner NOT included