Sharing: I use this Kwikset smartkey rekeying locks. If you need to quickly change the lock, instead of purchasing a new lock set and/or calling a locksmith, in less than 5 minutes you can re-key the lock.
insert the current key & rekeying tool (in the tiny slot beside the knob), follow the instructions for inserting the new key, the tumblers in the lock are now re-keyed for the new key.
The new locks come with a new key. I kept the keys from the locks I replaced to use as re-set keys. If you don’t have any, for about $10 you can purchase a re-key set.
They can be a little more expensive on the front end to purchase BUT if it saves you one entire lock replacement and/or locksmith visit it has more than covered the upfront price difference.