4 bolt security lock body 604S

These locks are used to increase the security of the building and are known as auxiliary locks. A unique feature of this lock at first is that four bolts are involved when locked. Also, the keys of this lock, which are known as special key, are designed in such a way that they cannot be made, therefore, they bring high security. The structure of this lock is designed in such a way that it is anti-drill and anti-acid and cannot be broken easily.