In recent years locksmith does tremendous work in the category of upgrading manual locking systems. One of the most important upgrades by locksmiths is the interchangeable core-based locking system. it is the system that solves the problem of lock wastage. In this system, a locksmith can be able to replace the inner core of the lock only with the new one, only when they face problems like lock key misplacement or any problem with the functioning of the lock core. Earlier before such technology people were generally asked to buy new locks whenever they face and lock key misplacement kind of issue. Interchangeable core-based locking system two types of keys are used first is used for performing the primary operations like actual locking unlocking and the second one is used for replacing the whole core of the lock with the new one. Locksmith Bronx Ny prefers to use interchangeable core specified locks on the large scale.