I published a 1″ Grommet on Thingiverse! Check it out. It’s very simple, but born of necessity. I used it in my kitchen to make a charging shelf inside one of our cupboards. Power for the charging hub is routed out of sight and then through the grommet. The grommet hides the 1″ hole I made with a paddle bit and finishes things off.
Now all our tablets, phones, cameras and other gear can catch a breather without displaying all their cables.