These Quick Release Shackles are the perfect size for miniature horses and small ponies. They are used to connect the combo end traces to the single tree on your vehicle.
Many vehicles do not have a hook on the single tree for the slot end of the traces so you would need to use a Quick Release Shackle on the ring of the combo end trace to connect your traces to the single tree. The pictures show how this will work.
These shackles have a heavy duty screw that you undo to connect it to the single tree. This is easier to manage but heavy duty enough to hold up under pressure.
One quick pull on the ring will release your traces from your single tree for easy unhitching or if you are in a bind.