Painting Pyramid strong / Maler Pyramide stark

I recently figured that i need a couple of painting pyramides which are stong enough to carry some furniture and the ones which i found arent really what i was looking for so i took to fusion and designed some myself. The base is 50mm by 50mm and they are 48mm high, with side attachments to screw them in place if needed. The holes on the side are 17mm wide. If you need anything else, feel free to reach out.