One of regular clients called, a Temple in West Orange. They have a pair of main doors. The problem, is they needed to close in order in to lock properly.
The picture shows a brown bar on the underside of the top of the door jamb, with a silver point sticking out. On the door is a silver metal plate near the point.
This bar and point is referred to as a door coordinator. The bar goes almost the length of the two doors and has two points one in front of each door. The metal plate on the door prevents damage to the finish of the door in front of each point.
The idea is one door has to push down the one point then the other point will release. If they close in the wrong order, the one door stays partially open until the other door pushes down its point.