Just one more tip, I bought oval jump rings years ago from a good supplier (not R&T!)

and had a lot of trouble closing them. On closer examination, the cut was not straight through the ring (perpendicular to the wire surface)--it was angled! Wish I could draw that on here....
Anyway, that made it really difficult to line up the two ends evenly after opening, because even the tiniest twist created enough of a tiny deformity in the shape that they never met evenly again. More surface area to line up, mathematically speaking.... No matter how I tried, I always ended up with an overlap that snagged or scratched.
I complained, but it turned out their standard jump rings were
all angled cuts. They contended that was industry-standard. Never saw it anywhere else, though. I still order stuff from them, but not jump rings!!
I just realized I have probably encountered every finding oddity you could ever possibly conceive of.... Just lucky, I guess.
