280kg 620lbs Holding Force Electric Magnetic Lock for Door Access Control System Electromagnet Fail-Safe NC Mode Features: An electromagnetic lock, magnetic lock, is a locking device that consists of an electromagnet and an armature plate used for access control door locks.By attaching this to the door frame and the armature plate to the door, a current passing through the electromagnet attracts the armature plate, holding the access control door lock shut.Unlike an electric strike access control door lock a magnetic lock has no interconnecting parts.it is possible to bypass the lock by disrupting the power supply.The whole system includes electric lock,power supply, access controller,exit button,door bell or RFID cards. Size/Dimensions: 250Lx46.8Wx25.2H(mm)