Offering the maximum in durable, reliable fall protection, the Ultra-Lok Self-Retracting Lifeline features 3/16" wire rope cable with a glass-filled polyurethane housing and stainless steel working components. The anti-ratcheting twin disc brake system stops falls quickly, limiting the arresting forces to 900 lb. or less. The lifeline extends and retracts automatically, allowing a worker to move at a normal pace. Swiveling anchorage loop and self-locking swivel snap hook provide further ease of movement while preventing twisting of the lifeline. Reserve lifeline retention system and audio impact indicator further ensure worker safety. Meets or exceeds all applicable industry Standards including OSHA and ANSI, especially ANSI Z359.1. Sold individually.