What is a door jam?

A door jam is a vertical structure on the sides of a door frame that helps to hold the door in place when it is closed. It also helps to stabilize the door and prevent it from swinging open or closed unintentionally. Door jams are usually made of wood, metal, or plastic, and can vary in size and shape depending on the type of door and frame they are installed in. They are essential components of a door system and play a crucial role in maintaining the security and functionality of the door.