This is a quick video going over the new 4 in 1 rotary tool offered by xTool. This can be used with both the xTool D1 as well as other laser diode machine brands. It allows you to engrave glasses, mugs, tumblers, rings, ornaments and many other objects.

Affiliate link:
https://www.xtool.com/products/xtool-...

Find the grid file and feet here: (RA2Pro_Grid.lqx)
https://www.thingiverse.com/thing:509...

Buy the 3D printed feet here:
https://www.etsy.com/listing/1101241782