The ACML-AQ1200 Electromagnetic Lock offers a holding force of 1,200 pounds. Magnetic locks are ideal for doors that do not have to stay locked in the event the power goes out. In the event the power goes out you can have a secondary lock such as a normal deadbolt or door know with lock. In some locations, Fire Code stipulates that doors must to be Fail-safe. MagLocks will always Fail-safe as they operate with power in order to stay in the locked state. When the power goes off or when a fire alarm is in effect, then the lock will release. This Electromagnetic Lock comes with a timer delay setting and will signal the access control panel when the door is open and closed. You can power this lock with either 12v DC or 24v AC.