The model is a basic bracket made initially to support 5kg spools of the wall.
Found further use in other applications.
I have also added the sldprt file so you can edit the bracket as per your requirement.
Printing points:
I haven't added the G-code as I'm using a Fab X printer not an international brand so the printer setting would differ.
The print is best with a layer height of 0.15-0.2mm. No support and print the bracket on the side not standing. refer below image
The author hasn't provided the model origin yet.