Typically the magnet part of the lock is put in on the top with the doorway frame as well as armature plate is attached to the door. The two parts make contact if the door is shut. If the magnet gets electric power, it results in a magnetic pull that https://holdenssqnk.signalwiki.com/1704290/not_known_factual_statements_about_keypad_doorlock_pittsburgh_pa