Padlock shim from can without tools

Step 6 Form final shape of shim

Tear, by the same method, a slit down the center of the piece about half way through it. Fold the outer end in half. Repeat on other side. How long/wide the middle needs to be depends on the lock a bit, it needs to wrap around the piece locking it about half way and need to be deep enough to do into it far enough to unlock it. It's helpful if you can angle both tears a bit away from the center, perhaps even get it a little wavy. Try to deform the center part as little as possible, it needs to stay flat.