That is really funny. My bad. I clicked through on the link and just saw the set at the top of the page. I actually can speak to part of the set you are talking about. I have the Iron Woody Fractional Plates and they are exactly what they say they are. I use them on a regular basis. They work great in linear programming.
I have never used the rebar bumpers which probably is a little more important.
Let us know how they are.
What we think, or what we know, or what we believe, is in the end, of little consequence. The only thing of consequence is what we do. -John Ruskin