Petzl's ASAP LOCK 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. The ASAP LOCK 20 assembly is ANSI Z359.15 compliant only when used with RAY 11 Rope (with or without sewn termination; sold separately).