A 500kg magnetic lock, also known as an electromagnetic lock or maglock, is a locking device that uses an electromagnet and an armature plate to secure a door. When power is applied, the electromagnet attracts the armature, holding the door closed. When power is removed, the door can be opened. Brackets, such as L-brackets or Z-brackets, are used to mount the magnetic lock and armature plate securely to the door and frame.