Foldable phone stand
thingiverse
This phone stand has got a hinge in the back. A M3 screw should fit in (tightly) make sure not to force too much when putting the screw in.
Download Model from thingiverse
With this file you will be able to print Foldable phone stand with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Foldable phone stand.