A small set of bending rolls. No really, they are very small indeed. Home made (particularly well) and apparently having had little or no use. I think they'd probably go through our Edwards rolls complete (at which point they'd be rather bigger, but much flatter).
You may have guessed by now that it's a Saturday afternoon, I'm in the office, can't remember their exact dimensions and don't want to go down to the workshop. If I get a chance later I'll put a lead on Angus and give him a walk down there to measure them, but in the meantime, from memory, they're about a foot long. ish.