Master key systems give you security and convenience, and it can give one persons access to all of the rooms in a workplace, but of course this should only be given to security staff and management personnel.
A high security master locking system can include an access control system for increased protection, and it can save lives in the event of an emergency when access is needed fast. You’ll often see the use of these systems in schools, nursing homes and student accommodations, and it’s a must have system for many businesses.
Master locking is can be frowned upon, but that’s only if the key does make it in the the hands of the ‘wrong individual’. This is why it should be kept safe at all times, with a trusted member of staff, perhaps just the business owner.