The file 'Cross Line Laser Alignment Mount For CO2 Chinese Laser CNC Machine 3D Printer Model' is (STL) file type, size is 63.5KB.
This is a mount to attach to an ebay Laser Engraving machine (50w) to mount two line lasers and a point laser.
Line lasers came from DX.com.
http://www.dx.com/p/2-5mw-650nm-line-laser-module-3v-46389
Here is a description video showing how this works:
https://youtu.be/fuagVWDyROM
Dot_Laser_Mount.STL | 50.3KB | |
Line_Laser_Bracket_Assembled.STL | 133.4KB |