OK, here is the black whats it......
The end with the crank handle on it does just that, it cranks round and round. The end with the lever on it moves back and fort, and the cup on the end of that has a piece that looks like it might pop something out.
The only markings on it are K.F.C. but I'm sure it has nothing to do with chicken.
Maybe this one won't be so easy!