This is a simple and very easy to print and customize latch lock. Just print: 2x Base 2x Top 1x Hook

Additionally you will need two screws (length and diameter depends on on your parameters, works well with m4x10 at the current settings). Assembly is pretty self-explanatory, just screws the tops to the two bases (slide the hook in one of them before)

Each piece is very simple to print and requires no support. The concept is simple and the lock works well, and it is fairly customizable.