You need to print 2 copies of the box and one copy of the pin to hold them together as a hinge. As the pin is waaaay too long to be printed standing up, or it would need supports, I cut it in half, and printed 2 copies of it too, then glued it together. I planned on using some leftover filament as the locking mechanism, but the hinge is such perfect fit, that I didn't need it at all - the box holds together on its own. If needed, however, a tiny piece of unused filament can be placed in the lock to do the job perfectly.