Lasers are fine as long as you don't point them directly into your eyes.

I usually don't push a point, "live and let live" and all that, but my mother
is legally blind.

Don't take my word for it, I implore you, do your own research - in more than one place, please...This is meant for use with carpentry equipment on wood.
Your going to put it on a machine that bounces the beam right
back to your eyes and your going to be staring at it for hours.

I'd much rather be proven wrong, than have one person harmed bc
they didn't know.
I looked at these a while back bc my mother wanted one on her
machine.

The line does not look thin enough for me to stitch a straight line using it. Looks like the beam is 1/8" wide which is a lot depending on what I'm working on.

Ok, and wow, I am so getting one of these, thank u so much for sharing this terrific idea

Thanks! I'm always looking for something I need from HF - I mean who can walk in that store and not but anything (not me).