Self-Retracting Lifelines Self-retracting lifelines (SRLs) (fall limiter, personal fall limiter, yo-yo, seatbelt, etc.) are viable alternative connecting devices to shock-absorbing lanyards. While traditional six-foot (1.8m) shock absorbing lanyards allow for up to 6 ft. (1.8m) of free-fall distance prior to activating, and another 3-1/2 ft. (1.1m) of deceleration distance prior to arresting a fall, self-retracting lifelines require less than 2 ft. (609mm) to arrest free falls. With shorter activation distance and shorter overall arresting distance, self-retracting lifelines reduce the risk of hitting the ground or any obstructions at a lower level. In addition, they allow for easier rescue in the event of a fall. Available with working capacities ranging from 9 ft. (2.7m) to 175 ft. (54m), self-retracting lifelines should always be used when fall clearance is less than 18-1/2 ft. (5.6m).