I needed a shim to bring a few wall plugs and switches out to the proper height and it was faster, easier, and cheaper to design and print this thing than drive to a hardware store and hope they had what I wanted. I could not find one when I searched for one so here is this one that you can customize the the correct height you need. This is a very simple design and you can dial in exactly the shim depth you need by changing the "thickness" variable in the OpenScad file. Prints quick at 30% (4 minutes for two shims). The first picture shows the plug recessed too far in. The second picture shows the plug unscrewed to allow the shim to be placed on the screw behind the plug . The last picture shows the whole thing finished with a plug at the proper height.