Often in setting up laser systems it is necessary align the beam level at a specific height. This thing is a customizable height standard for leveling a beam.
In customizer you can easily set the beam height. I also recommend getting some small rare-earth magnets to snap into the base for added stability (you can also customize the magnet inserts).
As always be careful with lasers... and melting plastic with them. Attenuate the beam if necessary.