Nuts make for a tasty, healthy snack, but they can be tough to crack. The challenge was to invent a nutcracker that does the hard work for you and collects the shells. It had to be able to crack any nut, be really easy to squeeze without any risk of pinching your fingers, and not send the shells flying all over the place. I tried all kinds of designs, but a double lever action integrated with a conical tube turned out to be the best solution. It took a while to get it right, but that's okay because it's designed to last forever.