The drywall screw has a body that is fully threaded, meaning that its threads will cut into both what you are fastening and that to which you are fastening it. It’s a primitive fastener ...

Part of that is probably because we’ve gotten so good at making them that they’re seen as cheap commodities, but the physics and engineering behind the screw thread is interesting stuff.

you're most likely to see the shorter variety (often fully threaded, and therefore missing the unthreaded shoulder) when fixing broken cabinet hinges and drawer slides. These screws are most often ...