The problem with locking file cabinets is that the key is inevitably lost. I have a file cabinet in my classroom. The top two drawers are locked but there's no key. When I was a kid I saw a movie in which a character picks a lock using a nail file. I practiced this skill on the garage door, and became quite good at it. I apparently never lost the skill, because now I use the nail file from the nail clippers on my keychain to open my file cabinet. When you work in public education it is important to bring all your skills with you. Now all I need to do is figure out a way to put my ability to stick quarters completely up my nose to good use.