It is as simple as changing 3 screws removin.
How to make my old door lock again.
Do not skip this last step.
Step by step instructions on how to change a door lock.
In most cases you will be able to solve the issue by tightening up the connections.
All you need is a screwdriver and the replacement lock.
Buy a grade 2 or grade 1 door locks rekey the locks you ve bought to match your existing house key make sure your door does not need a lock extension kit remove the old lock replace the lock latch install the new lock body check for proper lock alignment.