This is a tip-over prevention belt for securing propane gas (LP gas) cylinders to a wall. Unlike metal chains, it won't rust brown or make loud clanging noises. Suitable for food trucks and campervans. Can also be used for other purposes. Secure two hooks to the wall and hook the belt (band) onto them. This is a rare, long-term storage item. Photos 3 and 4 show a different one that was opened for the pictures.