3M™ DBI-SALA® Nano-Lok™ 6’ twin leg self retracting lifeline features aluminum snap hook anchorage on both ends. Installs to web of harness, leaves dorsal D-ring open for other equipment or rescue. Automatic quick-activating arrestor reduces fall distances and limits arresting forces to 900 lbs. or less. Impact-resistant housing for durability. Weight 5.8 lbs.