It's an antique tool for people who have lockjaw. It's pushed in between the teeth, and turned until the jaw is forced open. Abusive comment hidden. (Show it anyway.)
How very cool! I worked on this film short as one of the office workers. I was wondering if I'd ever see it, and thanks to Neatorama, there it is! (They cut my part out.. grrrr..) Abusive comment hidden. (Show it anyway.)