Ultra-Lok® SRL's come with a durable glass-filled polyurethane housing, a 1” web 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. Stainless steel working components for corrosion resistance. Reserve lifeline retention system for added safety. Swiveling anchorage loop to prevent twisting of lifeline. Lengths available: 11’ and 20’. Meets or exceeds all applicable industry standards including OSHA, ANSI and the stringent ANSI Z 359. Sold by the each.