Screws may not be something of great interest to many people, but there is a multitude of options that make them a pretty fascinating topic. Screws that are on such a small scale that you can’t use conventional tools to work on them, screws that have washers and other components built in, and much more.

If you’ve ever taken apart an old smartphone, whether that be because it’s broken and you’re curious, or simply because you’re technically minded,

you know that they’re full of tiny screws. In fact, there are 21 tiny screws inside of the Apple iPhone 6S which hold it together. These little micro screws were designed specifically to work with small and fragile products like the internals of your phone.

Cell phone repair technicians have special tools that allow them to work with these small products, and allow them to take them apart with relative ease. Obviously, your standard screwdriver would not be enough to do it. Thankfully, unless you’re a technician yourself, you won’t have to try and tinker with these tools.

But what about other small-scale projects that you might be working on? What can you do about those? What options do you have that you can work with? There are a lot of options that you can pick from.

If you need a washer, get an SEMS screw. They are small screws that can come with those annoying little components. No frustration included. Micro screws are the obvious choice for small electronics, but a SEMS screw, which comes in many sizes, is also a viable choice.

And if you end up getting your screw stuck, or stripping it, there are ways to handle that too. Most technicians are probably familiar with many of the ways to handle stripped screws without damaging anything inside, and can probably do it in minutes, like the repair technician in the video linked far above. For the rest of us? These tips can help.

So the next time you’re looking at your phone, think of what’s holding it together. You don’t need to tear it apart or make a career out of it, but it’s fascinating to think about.