Stainless steel working components for corrosion resistance 50 ft. 3/16" galvanized steel wire rope for durability Reserve lifeline retention system for added safety Self-locking swivel snap hook with impact indicator Swiveling anchorage loop to prevent twisting of lifeline Meets or exceeds all applicable industry standards including OSHA, ANSI and the stringent ANSI Z359 Ultra-Lok® SRL's come with a durable glass-filled polyurethane housing, a 3/16" wire rope lifeline and aluminum side plates for maximum durability and minimum weight. For added security, Ultra-Lok® systems have an anti-ratcheting twin disc brake system with an audio indicator to let you know it is functioning properly.