The Radium Release Hitch allows a load to be transferred from one rope to another if, for example, a Prusik Knot jams or a belay line’s auto-stop engages. It is commonly rigged prior to the operation by a Search and Rescue team on the belay line anchor. The primary function of this hitch is to transfer load back to the main load line if the belay line’s auto-stop becomes engaged. The resulting stoppage of the belay line can be due to a variety of causes including: main line load being lowered too quickly for the belay line operator to keep up or actual main line failure.