Friction-fit socket wrenches. Useful for putting on nuts when you can't get your fingers into a space.

Inspired by https://www.thingiverse.com/thing:4827293. Source at https://github.com/ademuri/shop-printables.

These are designed for 2-color printing, using this technique: https://www.youtube.com/watch?v=KV2AjyowXX4. Print the labels first, then print the bodies on top of them. You'll need to line up the STLs in your slicer.