I have two sets of keys: the ones on the top are my personal set. I know what every key is for and use them all the time. The set on the bottom is my job-related ring. (I have renovated houses for over 25 years!) Half these keys probably don't open anything anymore; but, I'm reluctant to just toss them. Heck, alot of my friends (former clients!) know I have 'an extra key' and they may have some odd situation where they might need it...or I might find that old padlock again...or maybe I just have a fondness for unlocking the memories that these little pieces of metal open up for me everytime I handle them.