If all of your locks are in good condition and you don t expect to be replacing all of the locks at the same time there is still the possibility that a locksmith can change the pins in your locks to match a single key.
How to replace a door lock and keep the same key.
You will need to get a new lock of the same manufacturer as the others and then have it.
Replace a broken double cylinder deadbolt lock with a new one.
Take all of the knobs with their locks and keys to a home improvement store.
Compare that price with the price of buying new locks not new knobs.
Insert the key for the current lock into the cylinder and turn it to separate the upper and lower lock pins.
Again your locks must match.
Double deadbolts have a k.
They must be the same brand and model and use the same number of pins.
Take the new lock and old key to a hardware store or locksmith.
Use smartkey technology to match the lock to your existing housekey.
Inquire whether they can be re keyed to the same key and obtain a price for re keying the locks.
They can re key the lock to fit the old key.
Dump out the old pins insert the new key and use tweezers or small needle nose pliers to match the new colored pins to the color code on the special instruction sheet.
Keeping constant pressure will keep the upper lock pins and their retaining springs in place when you remove the cylinder plug.
Push the plug follower through the cylinder using constant pressure to remove the plug.
The most comprehensive method of ensuring security it involves removing the existing lock from the door including the handle if it s a handle lock combo and then installing.
Insert the pins and reassemble the lock.
If you cannot find a local store that will rekey a lock inexpensively you can purchase the necessary tools.