The CRJ hanging rail, from Arakawa, is a heavier-duty rail than the CRE hardware. Each cable, hung from a CRJ rail, can support 65 lbs. of weight. What attaches the cable to the rail is called a rail clip. The top of the CR1 rail clip has a spring-loaded "T" shape which hooks into the rail at any point you wish. The bottom of the CR1 rail clip has a spring-loaded tube into which the cable is inserted. It grabs the end of the cable and tightens it grip the harder you pull on the cable, much like the proverbial "chinese puzzle." The rail clip can slide left or right without having to release anything.