And the key mechanism, built into the design of cylinder locks, in the process of locking, turns along with a cylindrical core. From the cylinder itself, the force is transmitted directly to the locking elements, and if one of them does not match, the lock ceases to function. The main difference between castles of this type is the ability to replace the core, if necessary, which is made without replacing the entire castle entirely. Similar locks are also called pin. Three types of products themselves, which are determined depending on the degree of disgusting of the product — Low Security, Middle Security, High Security. Thus, it is clear that the last type ensures the greatest security from hacking.