This rugged box can be locked with the use of the tumbler key. Quarter turn to the right unlocks and key cannot be removed until in the locked position.
The latch fits tight and needs a bit of force to get in. After latch is seated glue the latch cover on in its slot.
I used 5mm dowel rods for the hinge. Cut to 29mm long. I picked up a multi size pack from my local Dollar store in their craft section