This is a semi hinge to solve the problem that my toolbox only has partial hinges that often slip off. Cheap toolboxes like this often have this problem - I have seen this before.
By adding a semi hinge to the other side, it creates the effect of a full hinge that will not come off.
Other parts needed:
4x 3mm nuts and bolts
The infill needs to be high. While this is not load-bearing, screwing in the hinge could otherwise be a problem.
Place the hinges in place and then drill matching holes in the lid.