Doorstop

[4] Another method is to use a doorstop which is a small wedge of wood, rubber, fabric, plastic, cotton or another material.

The wedge is kicked into position and the downward force of the door, now jammed upwards onto the doorstop, provides enough static friction to keep it motionless.

The magnet must be strong enough to hold the weight of the door, but weak enough to be easily detached from the wall or hub.

In this case a rubber cylinder or dome—or a rod or block of rubber-tipped metal, wood or plastic—is screwed into the wall, molding or the floor in the path of the door.

Rigid metal springs (also tipped with rubber or plastic) are used to absorb and more widely distribute the kinetic energy of the door swinging.

[7] In his 1906 book The Right Way to Do Wrong, Harry Houdini recommends the use of a doorstop wedge to prevent a door from being pushed open from the outside, to deter burglars at night.