Step motor support and coupling

I needed a step engine to stand firmly close to my laser, in order to use it as a laser shutter.

The thing is composed of two parts :

- The support in which you can insert and secure your step motor.
- The coupling which fit to the motor's rotor and which allows you to get a glue-able surface to stick your piece of black cardboard. (the cut-cylinder shaped hole is below, not visible on preview picture)

This is typically compatible with usual "arduino" step motor kits like reference 28B