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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They can be made in just a few minutes. For this you need to saw off part of an old metal barrel and attach it with bolts to handles (e.g., spade handles). Yu MACHALA, 13 pet., Lviv, Ukraine
