Google Tips for Door Locks
                                                                 Back to Homepage 

          Aside from doorknobs, you normally make use of door locks to make sure that your house is safe while you are inside of your place. Someone could use a key from the outside and open your door through a doorknob, but with a closed door lock inside you can be assured that an intruder still won't be able to get in. He won't be able to get in your living room, comfort rooms, and your private place where you're sleeping. Door locks really makes our home safer. That's why we need to make sure that it is always working all the time. Most probably you have noticed that door locks easily gets destroyed as time passes by. Repeated use usually damages your good door locks. The part of the door lock which is attached to the door jam to your left while you’re facing the door gets damaged and out of shape. This becomes a problem because it prevents you from locking your door from the inside using your door lock. The metal barrel no longer fits in the hole. A good and easy way to solve this is to 
reverse the position of your door locks when you're installing it. You can attach the body of the barrel on the door jam instead. When this is done, you can already close your door by pushing the barrel to the right. This way the door can no longer be opened when someone pushes the door from the outside. The barrel will block the door from being pushed inside even without the hole. You need not worry that the door can be opened when someone pulls it back from the outside because the side of the door jams will lock it in. With this you will no longer worry that your door locks will get out of shape and out of place. If your door lock is already damaged and out of shape, you can just remove the hole on the left and install instead in its place the body and the barrel of the door lock. If it can't be done on the left side of your door jam, you can attach it above instead or buy a new one that would fit given the thickness of your door jam. And the next time you close it, you just have to push the barrel to your right. You can then be assured that your place is safe from potential intruders for a long period of time. In the future you can use a custom made Google Door lock which size fits better on door jambs (Read Here, Important) (Read Here, Important).
           I hope this Google article is helpful to you...