Why the most durable locks are usually the most expensive?
As locks are used over time, the tumblers in a lock cylinder tend to wear down causing the keys to stick in the cylinder and to malfunction. An additional reason is that the keys that were provided have been copied several times or the key has been worn down which can cause your lock to break. The solution is to have a professional locksmith make a new copy of the key and change the tumblers in your lock. It is the best idea to schedule this kind of maintenance before the key breaks down inside the cylinder. The most durable and usually most expensive locks have harder tumblers and the original key is made out of a more durable material which gives the locks a longer lifetime.