Various brackets for building a wooden box

Very simple brackets I used to create a box with 3mm MDF:
- 2 corners 75mm height, width, length. (one without bottom for two sides)
- 1 edge
- 1 flat
Surfaces are 3mm thick
Holes are 3mm Diameter
I printed mine in PLA with infill density at 0.3 and as strong enough to tap screws through without breaking.