Therefore, cylinder locks are reliable and they are often used for entrance doors. A significant advantage of the cylinder lock is being easy in use and replacement. Even if you lose the keys, you do not have to install a new lock, it is enough to change the core of the cylinder lock, and it will function again. It is very convenient, especially if you have a steel door where the lock is installed in the middle. You do not have to disassemble the door, because it will be enough to work a little with the lock. So, we can make a short conclusion that cylinder locks are a good option for any type of the door, whether steel door, or wood.