2.5 inch hole grommet for a desk or a workbench. It is made for a ¾ inch plyboard workbench that I needed cable holes in and wanted to avoid chafing the cables. Cut the desk hole with a 2.5 hole saw. I did not make a top because I need to fit different size plugs through and a variety of cables. You can scale the model up or down slightly to make it fit your application perfectly. Printed with PLA with concentric all the way around. Print Flat side down.