I needed strong jump rings that didn't open easily and seeing them with locking technology was new to me. With other jump rings, I could hold them with my non-primary fingers while opening them with pliers. With them I have to use two pincers to maneuver one of them. Always open by turning clockwise and it says here they click. Didn't notice, I just made a few small counter-clockwise turns until the rings closed. Once installed, further opening and reuse is not recommended. I've used four of these so far, mainly for the 40mm or so pewter medallion - it's holding up really well, On the other hand, I don't wear it often, it's more for good luck. Shortly after I bought these I was at work and my necklace fell off. Upon closer inspection, I noticed that one of the jump rings had opened. I knew right away that I had the perfect solution to keep my most prized jewelry from falling apart. They are really good value for money and I believe they are sterling silver as advertised.
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