Ironically, the tweezers I ordered for a song on Amazon don't even appear on the little pictograph. I got 6-SA, which I absolutely fell in love with while working with precision instruments. I believe a tweezer of this type from Viola in Italy cost something like $50. Take that number, divide by 2, then cut in half, and that is what I paid. All in all, they are solidly built tweezers, but no where near the precision they claim on the "featurer" list. However, I have yet to try out my favorite claim, that of the "not tired for a long time operate." I'll get back to everyone on that one.