A locksmith's toolbox

What's there to do when the locksmith is changing your doorknob for you? For reasons known only to the door, it refused to open. The doorknob needs changing anyway. I have a feeling this will just happen anytime. The carpenter who fixed it for me last time was a lousy one.

The new doorknob cost 70 bucks, and the locksmith charged me 30 bucks for the workmanship. This took place at night. If it's midnight, i may have to pay more. I hope this new doorknob lasts forever. Or at least until i move away. Till then....