First remove the old door lock by unscrewing the doorknob on the inside of the door.
Front door lock diy.
If you know your way around a basic screwdriver you should be able to tackle it in under an hour.
Full installation instructions come with.
Both doorknobs should come loose from the door when you remove the screws.
Once the new pins are in reverse the steps to reassemble the lock.
You can also add a deadbolt to an existing keyed lock.
You can take it on trips to use in motels or use at home public bathrooms etc.
When rekeying multiple locks to fit a single key all locks must first have been made by the same manufacturer.
The screws may be obscured by the door handle so you may need to turn the handle to reach the screws.
For example if your front door lock is a schlage the other locks you want.
These may be as little as 15 when purchased separately.
Very easy to make.
Replacing door locks is a relatively simple diy project.