3M™ DBI-SALA® Nano-Lok™ Edge Self-Retracting Lifeline's compact design is easily worn on the user's back and stays out of the way; it can also be used as a lanyard replacement. Whether the application requires single or twin leg configurations, mounting to an overhead anchor, or connection directly to a harness, there are numerous models to choose from to suit a variety of applications. 3M™ DBI-SALA® Nano-Lok™ Edge Self-Retracting Lifeline is designed to lock quickly stopping a fall within inches - providing more protection at low heights. In addition, tension is maintained on the lifeline, which helps reduce potential dragging and trip falls. Complies with ANSI Z359.14-2021. Class 2.