I don't know what it is off of and the guy that gave it to me didn't know. With the hooks facing fwd I would thank it couldn't hold reins. If I remember right there was something in front of you to hang the reins on. The best thing I can come up with is off a 2 roe planter and they hold the markers for the next pass, but with the facing fwd I can't understand how it would hold them.