If you wondering about the series of locks used by large institutions, commercial sectors. Then the answer for this is interchangeable core cylinders. These cylinders as per name are changeable and can be replaced with a new one if you lost your key. The most important advantage of this is there is no need for the change of whole locking equipment. As all of you know that the main mechanism of locks is completely based on their inner core cylinder that is fitted in between the lock body. Locksmith Queens prefer such a system to all major institutions. The working of the lock is based on the use of two different keys.

One is the standard key for actual locking unlocking the door and the other is the control key which is used for the removal and insertion of the whole core in and out of the door lock body. This design is helpful for those who can’t afford new locks every time whenever they go outside and come back after losing your keys.