[@mmc_jake]

The GLIFO pen holder may offer some good inspiration for how to secure tools. Lots of insight into their design process here: [GLIFO – Luca Toscano Otto (toscanotto.com)](https://www.toscanotto.com/portfolio/glifo/)

The latest version uses 3D printed threads to lock a pen into place. [GLIFO – The custom-made writing aid by OpenDot — Kickstarter](https://www.kickstarter.com/projects/opendotlab/glifo-the-custom-made-writing-aid)

https://ksr-ugc.imgix.net/assets/030/686/548/7ab6e8f90db21377842ed35f16d388cf_original.gif?ixlib=rb-2.1.0&w=680&fit=max&v=1600704046&auto=format&gif-q=50&q=92&s=3e15e2f3a8ead015a3bd38c1b15e98e3