Have you accidentally been locked out of your mailbox, or lost the key for a cabinet holding all your important documents? For being such small locks, the ones on mailboxes and cabinets can be deceptively difficult. This tutorial shows you how to pick a four cylinder lock easily. You'll need some basic lock picking tools, scaled down to match the small size of the pick. Once you have the right tools and technique down, it's just a matter of being able to get past all the pins.