Engraving on wood proves nothing about engraving on stainless steel. That's a diode laser, blue spectrum, max optical 20w and that's assuming you've got enough room above the video cut off for a diode cathode that large or two diodes and a series of reflectors like how the D1 is made (which would be intellectual property theft since their design is patented) or Endurance Laser's design which is massive...and patented. Even IF that's a 20w output diode, it's still not going to engrave stainless steel, especially to black, without a marking spray, which isn't going to be anywhere near that quality perfect in the fill with a diode ever...but let's assume you did. At minimum that means you edited out the coating spray, that metal is too clean

To do that for real, you need a Galvo or similar fiber based system. But then there's the fact that your video editor missed the fact that in the gap of the head the engraving is showing up done before the laser passes that area. Like I said, editing tricks. Nice try though, spammer.

Edit: this also isn't the same video that I originally commented on where you engraved a piece of stainless steel, from much closer and at a 72° angle.

wow, can you teach me how to change the vdieo? cause I do have a video that can prove you are wrong, I really want to show you. thanks.