Locks; a mechanical or electronic fastening devices released by a physical object. Electromagnetic plates positioned at the top of the door are the ideal lock for access control systems. They are extremely strong and reliable. Lock allow only those with the correct key to open them and gain access.

The common cylinder locks and the ancient mortise lock are two more types of traditional door lock. Mortise lock resembles rim lock, with a mechanism much larger and installed into a hollow in the door rather than a simple hole. Mortise lock being more secure and easier to integrate with an access control system. Cylinder lock can also be outfitted with electronic locks