You can secure the door by simply stepping on the stopper when your hands are full. It can also be installed on doors without magnets by attaching the adhesive tape to the auxiliary plate. Caution: *Do not use for purposes other than as a door stopper.* *When attaching to wooden or aluminum doors, please use the included auxiliary plate.* *When installing with a magnet, remove the "steel plate" with double-sided tape.* Included: Auxiliary plate (1)