PCB corner holder

A corner piece for making custom pcb cases. Can fit sheets up to 4mm. Used to make an enclosure for my anet a8 motherboard. Has 5mm-high posts for the pcb to sit on and a total height of 30mm (the height i needed to incorporate a slim 80mm fan in it). The board is screwed using four M2.5 5mm-long screws meanwhile the top and bottom holes require a M3 screw (I would suggest using some brass inserts)