They can re key the lock to fit the old key.
How to replace a door lock and keep the same key.
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.
Inquire whether they can be re keyed to the same key and obtain a price for re keying the locks.
Push the plug follower through the cylinder using constant pressure to remove the plug.
Again your locks must match.
They must be the same brand and model and use the same number of pins.
Rekeying locks to match keys.
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.
Compare that price with the price of buying new locks not new knobs.
Take all of the knobs with their locks and keys to a home improvement store.
Insert the key for the current lock into the cylinder and turn it to separate the upper and lower lock pins.
Once the new pins are in reverse the steps to reassemble the lock.
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.
Purchase a rekey kit made specifically for your brand of lock and rekey it yourself.
Keeping constant pressure will keep the upper lock pins and their retaining springs in place when you remove the cylinder plug.
Double deadbolts have a k.
Take the new lock and old key to a hardware store or locksmith.
If you cannot find a local store that will rekey a lock inexpensively you can purchase the necessary tools.