OMTech 50W Fiber Laser Metal Marking 8x8 Inch Bed Engraving with Roraty Axis A. Cooling System Built-in Air Cooling. OMTech 50W Fiber Laser Metal Marking 8x8 Inch Bed Engraving with Roraty Axis A. Includes EzCad2 software compatible with Windows XP/7/10 (32 and 64 bits).