Retractable Horizontal Lifeline it combines the span flexibility of our synthetic-rope HLLs with the durability of our fixed-length cable HLL systems. The Retractable Horizontal Lifeline features an integrated shock absorber and can accommodate up to two workers in fall arrest. The ergonomic carry handle and spool release make paying out the lifeline easy and snag-free, and the permanently mounted retraction handle stays out of your way until you need it. Its unique unidirectional design prevents unwanted spinning during payout, and has a ¼” hex shaft that accommodates a cordless drill for ultra-fast retraction if desired.