The Guardian Halo 25 ft. Web Self Retracting Lifeline features 5mm galvanized cable, thermoplastic housing and comes with a carabiner for anchorage attachment. It is designed with the worker in mind, featuring a stackable space-maximizing design, high strength web lifeline and built-in swiveling anchorage point. It extends as the user moves away, and retracts automatically enabling the user to move about within a recommended working area at normal speeds.