Also known as a grappling hook, this device is very useful for climbing. You simply turn the top hook clockwise until it is tight, then toss the hook up to whatever you wish to climb. Pull hard on the rope to establish firm hold, then use the support to pull yourself up. This is excellent for law enforcement, fire fighters, rock climbers, and emergency rescue or recovery use. You c an also lower yourself from a cliff or rooftop in case of emergencies.Approx. 40 feet of rope-added to the 10 inch length of the shaft-unit weighs 3 pounds Sturdy polypropylene rope-thickly woven, and break resistant Solid steel hooks and shaft-similar to the equipment carried by fire and rescue first responders Hooks measure 7" end to end- hook to a tree trunk, roof top edge or other stable surface This is an excellent aid for rock climbers-take it with you camping-great for emergencies