device to stop doors from opening
A doorstop is an object or device used to hold a door open or closed, or to prevent a door from opening too widely. Alternatively, a doorstop can be a thin slat built inside a door frame to prevent a door from swinging through when closed. A doorstop may also be a small bracket or 90 degree piece of metal applied to the frame of a door to stop the door from swinging and converting that door to a single direction.