Slip collar upright adjusts to desired height simply by lifting the inner pipe upward. These work like a telescope for rapid height adjustments. It works on an internal ball-bearing (slip-lock) system, so as you raise the inner pipe the weight locks the upright into place. To release, and lower back down, simply raise the inner pole to release the pressure, lift the ring and guide the inner pipe down. Our pipe and drape systems are heavy duty quality and used in the special event industry as backdrops for events, trade show conventions, photo booth backdrops, decorative backdrops and many more uses. This product is very durable, easily transportable and amazingly easy to use. All our slip collar adjustable uprights undergo a quality control inspection to ensure all adjustable uprights are properly working to ensure quality product. Our Pipe and Drape Kits are designed for the of commercial & heavy duty use. They are strong and stable enough to support multiple fabric layers, props, lights, etc