A magnetic lock is a
simple locking device that consists of an electromagnet and armature plate. By attaching the electromagnet to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate holding the door shut.
The magnetic lock relies upon some of the basic concepts of electromagnetism. Essentially it consists of an electromagnet attracting a conductor with a force sufficiently large enough to prevent the door from being opened.
Normally easy to install
Magnetic locks are generally easier to install than other locks given there are no interconnecting parts.
Magnetic locks unlock instantly
when the power is cut allowing for quick operation in comparison to other locks.
Competitive with conventional locks
Despite common misperceptions, today's magnetic locks are competitive with conventional locks. Magnetic locks may also suffer less damage from multiple blows.