It is an electromagnetic lock. It is extremely reliable and rarely hacked lock. It is majorly used in office premises, where access of particular places is allowed to authorized group of people. An electromagnetic lock creates a magnetic field when energized, causing electromagnet and Bracket plate strongly attracting to close the door. With the authorized access card, the magnetic field can be disturbed and door can be opened. It provide high level security to secure ODC in offices or R&D labs .