Anchorage connectors fasten to an anchor point, typically a beam, and a connecting device such as a self-retracting lifeline or shock-absorbing lanyard. Also called tie-off points, anchorage connectors ensure that a worker who is attached to a connecting device has full fall support. Permanent anchorage connectors include D-ring anchors, which fasten a plate and clip directly to a beam. Temporary connectors include fixed beam anchors and hook anchors. Fixed beam anchors attach to I beam and H beam flanges and slide along the beam as the worker moves. Hook anchors are straps that have one hook end that attaches to rebar and one clip end that attaches to the worker.