Hmmm, odd looking thing. The clamps don't look like they are long enough to meet, so it's designed to hold something of a minumum size. It's not stable enough, by the look of it, to be used to hold something while it is worked on, i.e. like a vice, so I reckon it is for decorative purposes, maybe in it's own right, or to hold something for display. But hey, what do I know?
