Electromagnetic Door Lock

An electromagnetic door lock, also called a "maglock", is a security device that uses electromagnetism to hold a door shut, where an electromagnet mounted on the door frame attracts a metal plate attached to the door, effectively locking it when energized with electricity; when power is cut, the magnetic force releases, allowing the door to open freely; this mechanism is considered fail-safe, meaning the door automatically unlocks in case of power failure, facilitating emergency egress