National Hardware V7619 Safety Cable for Extension Springs, 8-Feet 8-Inch x 1/8-Inch, Galvanized
This cable is installed through the extension spring and anchored on both ends in order to contain the extension spring should it happen to break under tension. One end of the cable has a bracket for mounting to the door track and the other end is looped and ferruled for easy connection to the support brace with the included quick link. It is an important safety item as it helps prevent injury and property damage in case of extension spring breakage.