The Nano-Lok Edge self-retracting lifeline has been developed especially for working at great heights, when the anchorage point of the lifeline is at foot level. In case of a fall, the lifeline cannot be damaged by extremely sharp edges and is providing the wearer with a complete assurance that it will not rip. In addition, the automatic retraction of the unused section of the lifeline reduces the risk of tripping. The system has been designed for user weight up to 141 kg, exceeding the industry norm of 100 kg.