Some early nutcrackers work using metal hinges or levers. For instance, a lever-forced nutcracker worked with the nut placed in the mouth of a cast metal figure like a dog, alligator, or wolf.

you really ought to start thinking about cracking some nuts. Now really, what better way to invite your family and friends to deshell a few than with a metal themed nutcracker? You can have ...

We would have liked to see it in use with a tiny nut, but we imagine it would work just fine. If you get excited about making things from a single piece of metal, may we suggest a nutcracker?