I was thinking inuit harpoon myself but they recon its an arrow head? I don' t see anything giving dimensions, what makes you think its not as they say?There's no way it was ever fired from a bow. I think it's likely a seal harpoon, the point fitting an equal shaped hollow in a spear handle and, as mentioned, a line attached. I've seen footage of Eskimo people hunched over ice holes waiting for the seal to take some air using a similar device, but more of a toggle that releases within the animal than this thing. I don't see it as an active hunting weapon, more a lying in wait weapon.