Contest: Guess This Obscure Tool, Win More Tools

We’ve created a new challenge for you here on PopSci.com, whereby you can show off your obscure knowledge of tools and, well, win new tools!

Here’s how it works: We’ll post a picture of an object, maybe a clue or two, and you guess what it is in the comments section below. The first among you to guess correctly will win the prize. This week, it’s a 20 ounce Stanley FatMax hammer. Pretty sweet.

Leading off the Mystery Tool series is, fittingly, a machine with which I have a strange obsession. It’s nearly a century old, has a rotating set of dies, and works with trays of small thin metal plates.

Good luck!