3M DBI-SALA Nano-Lok Self Retracting Lifeline, Twin Leg. Designed for foot-level tie-off and leading edge applications. Nylon thermoplastic housing material with zinc plated steel lifeline hooks. Includes an 8' total lifeline length of galvanized cable. Mounts directly to harness back. Complies with ANSI A10.32 and Z359.14, and OSHA 1910.66 and 1926.502. Rated for 310 - 420 Lbs.