I saw this while searching around on eBay.
It's something called a Rivet Buster. Apparently it's for removing rivets on an industrial scale for scrapping and disassembly operations.
Anyway, I need
someone to buy this and test it out on their bus.
After removing all of the rivets for the roof raise with a Harbor Freight air hammer and chisel, I would have tried anything.
On a side note:
I'm surprised that industrial rivet removal is just as limited and primitive as we have defaulted to for our buses. Convergent evolution, I suppose.