Insert the legs into the holes of an optical table, add a business card, ruler, or other thin stock material to create any of the following:
a) beam block
b) beam height reference
c) custom aperture
Designed for an optical table with 1/4-20 holes on 1" centers.
This is a single-item print, but it does print upside down for stability.
Designed on Tinkercad.com: https://tinkercad.com/p/acc059060a42bf22/38
The "Trimmed" version has slightly smaller legs so it is easier to use (but less stable). Choose between them based on your requirements and how permanent you want it to be.