Have you lost all of the keys for your lock and need to make a new key from scratch? Does the locksmith lack a key blank that will fit your lock's keyway? Grab a metal file, some scrap sheet metal, and read on for a rough & tumble do-it-yourself key making guide!
I made mine at http://techshop.ws
Reverse engineering a key from a lock is not that difficult, providing the lock can be disassembled. In order to follow this instructable you will have to have access to the lock itself, which usually means the lock is not locked to begin with. If you're hoping to make a key for a container that is currently locked, you'll have to pick it open first, or research the key making method known as 'key impressioning'.