About this 3D model

My RaspPi's are hanging with adhesive tape in my storage room on the side wall of the electrical box, which is made of metal. I designed these holders for this purpose. There is space for 3 magnets measuring 8mm x 3mm, which are attached with glue in the holes provided. Then stick the plate to the back of the Pi or other objects using glue or double-sided tape. To reduce the risk of falling down, I added a narrow wall to the bottom. Maybe this will be useful for some of you, too.