It's obviously the anvil for a metal nibbler, which I must have bought thinking it would fit my Bosch 2mm capacity job. But it doesn't. The square flange at the top is 19mm by 19mm, as is the diameter of the cylindrical piece. Overall length is 55mm. It's never been used. There's no cutter to go with it, but it might help someone. If anyone can suggest what machine it might fit, they can have first refusal.
