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.
Recommend to read
Power Management Center in the Garage
The proposed development has, of course, nothing to do with space. In this case, PMC (Control Center) is a control center for only the power supply of electrical equipment, not for flights...
“ETERNAL” GATE
Whatever fence or a fence of a country house, a gate and a gate, usually of wood. And, as a rule, short-lived: do not stand up attributable to stress.After all, if the gates are not too...