This is a heavy brass spring hinge and quite strong. The spring is on the outside of the door, and when the hinge is mounted to lay flat, the door will be closed—or the spring keeps the door closed. The door would have to be substantial because the spring is strong.
The hinge has these words: “PAT’D DEC. 26, 1876.
The hinge measures 2 1/2 inches vertically.
We will include brass screws.