Customize your own hair / beard / travel comb with this thing. On top, you can set a personal text like a name or whatever. There are innumerable different comb designs you can create.
This is a customizable thing, where you can print your own retro lightbox. These boxes normally costs >20 bucks, a printed one costs me about 5 dollar.
With this customizable design, you are able to create bushings, that will be printed in an optimal way. You can set the inner and outer diameter, the length, the extrusion width, number of perimeters and number of teeth.