I made this towbar for a neighbor's cultivating tractor. As you can see in the last (very blurry) picture, he had "attached" a standard towbar from a much bigger tractor to be able to pull a small fertilizer spreader, and he basically wanted a more elegant and permanent solution. I took some measurements and drew up a CAD model for him to look at. He liked the design and I made it, using a piece of 1/2in plate I found in the woods and some hardware from the store.
We thought it would be funny to add a random "NOTICE!" plaque to the towbar. It serves no purpose other than to be pointless and funny.