3M DBI SALA Nano-Lok Edge 2.5m Twin Leg Web Self Retracting Lifeline with Rebar Lock Hook 3101448Nano Lok edge is specifically designed for foot level tie off and sharp edge applications often found in construction. It is ergonomically designed for ease of use and is ideal for direct connection to most harnesses. The extremely compact and lightweight design is virtually unnoticeable on your back, staying out of the workers way and making it ideal as a lanyard replacement. Whether your application requires single or twin leg configurations,