The following step file enables you to print an engraving laser head, just like the 2 W engraving laser head from Opt Lasers. Such a laser module can be used to implement your laser engraving ideas into reality. The file is also originally available as a free download on the webpage:

https://optlasersgrav.com/ 

By clicking the link below, you can also find out what the specifications of this laser head are:

https://optlasersgrav.com/laser-head