Safety Hub Ghana Vertical rope lifelines and rope grabs work together to provide a tie-off point for one working using a personal fall protection system when workers are climbing or working vertically or on a slope. Rope lifelines can be customized for different environments and configurations. Rope grabs serve as a connection point between the lifeline and a lanyard. Manual (or fixed) rope grabs require the worker to move the grab as needed. Trailing (or mobile, passthrough) rope grabs move freely with the worker in one direction, but stop automatically when f all pressure is detected.