How did they get the steel rod through the plates? Is it sealed? Glued? Does that seal leak? What if it gets heated will the rod break the plates? How do you store it? Do you just have a tall unwieldy double plate stick thing? Maybe the cap screws off and you can remove the plates and then you just have 2 plates with holes in the middle?  This fascinates me, it seems like such a bad idea that no one would make it, but there it is. http://archive.is/DJdzr