Welcome to the return of Friday Whatzits, and boy do I have a good one for you.
In this game, I give you a photo - either of a whole object, or a small part of an object, and you get to guess what it is. Then, sometime early next week, I reveal the identity of the object! Today is a whole object, a mystery object for you to guess.
(Click on photos to see larger versions)
This unpleasant looking device is made of metal.
It has a hinge which allows the opening to be adjusted.
So.... what is it?