Petzl's ASAP 20 Kit is a pre-assembled and ready-to-use personal fall arrest system. This kit includes a mobile fall arrester, an energy absorber, and a connector. Installed on a lifeline, this mobile fall arrester follows the user as they move, whether on an inclined or vertical surface. In case of a shock load or sudden acceleration, they lock onto the lifeline and stop the worker, even if grabbed during the fall.