The lock bolt is in the mailbox does not always withstand the encroachment of the feeder bullies. Too primitive its form is thin and the iron from which it is made.
But if you replace the stock bolt with steel plate cross-section 20×3 mm, bent as shown, so just the box, no one will open.
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NO HAMMER AND DOLLY
In the practice of homebrew somehow less common device is a bending machine. I don't think this is due to the rarity can be accomplished with it operations, rather — the lack of...
Shovel of vcsel
If the hand is a metal sheet or scrap plywood, enter them between the fork tines - get a good shovel.
