This is the perfect size jump ring for my designs when I need a 5mm ring. It's not too flimsy and not too thick. Most rings on clasps, etc. will easily take this 1mm thick jump ring. Even though the 1x6mm open jump ring is most used by me, I like to use the 1x5mm open jump ring when I don't want to emphasize the look of jump rings in my designs.
These jump rings are good quality. They are the ones I go to when a 16 gauge is too thick. Unless Artbeads has changed something in these rings, these are 17 gauge. The next best thing to the heaviest gauge Artbeads carries.