A big upside to owning a 3D printer is being able to print things for next to nothing when you need them. While tools made from filament like PLA and PETG lack the durability of even their cheapest metal counterparts, they’re often good enough in a pinch.

There are a huge number of printable micro screwdrivers available for download, like this one. This model is available as a tight fit with no magnet, or as a slightly roomier print, which should be combined with a 5x3mm magnet for a snap-fit. Another interesting design is this miniature screwdriver that uses a shape that should give you a bit more torque.

These all take standard 1/4-inch bits, which you can pick up relatively cheaply. Since you won’t be putting tons of force on them, you can afford to cheap out on these bits (something you shouldn’t do if you’re shopping for a set to match with an impact driver).

A vernier caliper allows you to accurately measure the size of an object from one outer edge to the other, or the gap between two points, and many are also often fitted with a depth gauge. They’re ideal for designing 3D prints, where accurate measurements are vital to maintaining a tight tolerance.

While a digital caliper provides a more accurate and easier-to-read measurement , analog calipers have stood the test of time. You can print your own with models like the vernier caliper rulers and functional mini vernier calipers .

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