"CC" wrote in message
I found that after learning what they were called and have bid on them
thanks

One thing to check on if you're buying used and pick them up in person. Make
sure the vertical part that's welded to the bottom piece isn't about to
break off. They're the weakest part of the assembly. The two I have never
reached that point, but I did notice how easily the vertical parts would
bend where they were welded on. Repeated unintentional bending would weaken
that area to the point of separating.