When it comes to older homes from the 40s 50s 60s and even the 70s era, Lock mechanisms and specs were a lot different than today’s locks.  As you can see here in this picture, we have to use special plates and re-drill the door to normal specs for today’s locks to fit properly and we also added a deadbolt for extra security in order to hide the old scars on the door we use Special remodeler plates to cover any old marks from the old lock hardware  that we removed. These comes in many different colors and sizes.  Initially, the customer planned on replacing the whole door, but after we gave him this option, they were delighted that we saved them a ton of money on fitting and replacing the whole frame and door.  Advanced Lock And Key we do it right.