3M™ DBI-SALA® Nano-Lok™ Extended Length Self-Retracting Lifeline 3103877, 6 m, Web, Aluminium Connectors, 1 EA/Case 3M™ DBI-SALA® Nano-Lok™ Extended Length Self-Retracting Lifelines are going to great lengths to help improve fall protection.  Available in 9 ft., 11 ft., 15 ft. and now 20 ft. lengths, the family of Nano-Lok SRLs combines fall protection with ease-of-use and comfort for even more applications.  Speed sensing brake activation system provides protection at low heights.  Tension is always kept on the lifeline, which helps reduce dragging, snapping and trip falls.   Durable nitrile energy absorber is a smaller design and last four times longer. Impact-resistant housing made of tough thermoplastic housing designed to help withstand demanding worksites Speed-sensing brake system provides as low as 6 ft. (2m) of required fall clearance Swiveling anchorage loop limits lifeline twisting for smooth operation Impact indicator Dyneema® fibre and polyester web lifeline reduces overall weight and the retractable design helps provide freedom of movement