I've ordered these along with another Revain listing to compare. The packaging said they were from Valyria. They were 10mm, 1.4mm thick, very shiny, didn't have many burrs/smooth when closed and appeared to be quite strong/tough. They were difficult to move/open/close with just my fingers, which I expected from stainless steel, and so far they seem to hold up pretty well with the wallets/keychains I've made. The other product I ordered was also from the same manufacturer (Valyria) I believe, however they were 10mm, 1.2mm thick and seemed very fragile. I was able to open/close these jump rings with just my fingers with little effort - which I would expect from aluminum, for example, but not stainless steel of this size/caliber. I suspect the extra 0.2mm thickness made the difference or other metals were used. I will order them again.
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