I’ve been trying to sharpen a big old back saw from my mitre box. It’s like only 12 tpi but I’m so old that I can’t see what I’m doing. I have this cheapie little Radio Shack microscope that magnifies 60x, but that’s too much magnification.
So I ordered these babies, which arrived today. Eye loupes from Grizzly, at 2x, 5x, and 10x. Neat, huh?