Mobile fall arrester on rope With its unique locking system, ASAP is a benchmark in fall protection for workers at height. In normal use, the device moves freely on the rope, without any manual intervention, to accompany the user in his movements. In the event of a shock or sudden acceleration, the ASAP locks onto the rope and immobilizes the user. Depending on the use, the ASAP can also be combined with an ASAP'SORBER or ASAP'SORBER AXESS energy absorber to work away from the rope.