It looks like the flat part braces agains something and the part with the pointy thing locks in and holds something, then you use it like a pipe wrench.

It also looks like a pipe would fit in the inside area, or some long, rounded or oblong object with a lip on it (for the flat part of the tool).

Or it could be one of those old Egyptian removing-the-brain-through-the-nose mummy-making tools.