It's homemade.
You just need a bare ball mount, (no trailer ball) and a pin.
Best solution would be to get a welder to cut that mess off and weld on a proper hitch.
Be careful! Properly repairing a trailer requires an experienced welder. You have potential for a serious accident if a weld fails! Not necessarily a good project for learning to weld. Good luck and show us how it turns out!Thanks all for the info. I will try and find a pin for it. By coincidence, my youngest is taking welding in high school. I think cutting that contraption off and welding a proper hitch would make for a nice little project for him![]()