I needed 2 of the folding support arms to install either side of a shower enclosure (externally) to provide support for my elderly parents to they can safely enter and exit a corner shower cubicle. Unlike many other models, these have a wide hinge which provides good lateral support and are spring loaded, which makes them easy to fold up and down - without risk of hurt or damage. It was good to have the shorter option also: as the normal length would not have worked in my application. They work extremely well!