A versatile small stand for physics experiments. 

It can be used for objects with a 100 mm rod for example my laser-pointer mount or my other stand materials.

multiple stands can be aligned when putting on a 100 mm rod for optics experiments.

https://www.printables.com/de/model/88303-laserpointer-mount

https://www.printables.com/de/model/56296-stand-material