Rothco s 294 Black 80mm locking carabiner is designed to hold items or secure gear (not for climbing). It locks with a threaded barrel. It’s made of high strength aluminum. Can be used for multiple purposes. Not for rescue or lifesaving. Not For Climbing | Locks With Threaded Barrel | High Strength Aluminum | Use to Secure Accessories or as Key Chain ROTHCO Locking Accessory Carabiner 80mm Black