3D Printing GRIT Trailer Hitch Plug: A 3D Printing Project & Timelapse Posted onNovember 1, 2024November 2, 2024 For my next project, I came across trailer hitch plugs on Maker World. One kind individual listed a blank 2-inch hitch that sped up the process for me. What it rolled into, is the rabbit hole I’ve been mentioning when joining this community.