https://beamq.com/30w-laser-module-cutting-kit-fixed-focal-length-p-2046.html DIY this 3W blue laser module for all kinds of engraving. You can engrave and mark personal logo text on wood plastic metal , and other materials. UC5l4akjlUsk00Bzx1u14auw laser engraver for #DIY #Laser #Engraver #Wood #Plastic #Metal