Modified these so you don't have to use screws or use the pieces of filament for the two locks
Recommend using your best quality printer settings when printing the "spring" and 6 "rivets" You will need to super glue the 6 "rivets" when assembling
You will need to print 2 of the "locks" and 2 of the "loops"
Insert the key and turn in one direction to unlock one side then the other direction to unlock the opposite side.