A rotary / pen jig for the Ortur Master 1 laser engraver.

Depending how you got here there is a better (in my humble opinion 😉 ) pen / rotary jig available:

https://www.jafweb.co.uk/index.php/product/direct-drive-pen-rotary-jig/

https://www.facebook.com/groups/2150167618622948/