Great quality. I'm a returning customer.
I think they are slightly less quality (less shinny, less polished ends, a toolmark across the border) than the same supposed frets bought 2 years ago (they were just perfect then), but at least they seem to be stainless steel. I hope they are at least as hard as the old frets, they seem to be at least same measure, but the tang is not the same, so they may be other brand or manufacturer.