It’s what used to allow the shower door in our travel RV to be also used to separate the front from the back. One way it was closed against the shower leaving the hallway open, or it swung across the hallway and when secured with this latch, blocked the hallway separating the front from the back.
This part broke. There was a plastic insert in the ring which locked onto a piece mounted on the wall on the other side of the hallway. Unfortunately when the latch was installed the two pieces were not lined up properly.
Closeup of my fix of the hole, toothpicks and glue. If I just screwed the bullnose part back into the same hole, the door bracket would soon be broken again.
New door bracket mounted exactly like the broken one. I pushed the bullnose into it after removing the mounting screw, then closed it across the hall. The hole where the screw goes was slightly below and to the left of the repaired hole.
In this position I drilled a pilot hole using the screw hole in the bullnose as a guide, then screwed the bullnose in place. The door now works perfectly. Happy wife, happy Life.