Sorry, but these are just plain jump rings---even the photo shows that the openings are just plain flush-cut. I thought the real jump locks actually had a funny shape on the ends that interlock. Am I missing something here?
Some jump locks do have a tiny "bump" that fits into a hole, but some just look like regular jump rings. The difference between this jump lock ring and a regular jump ring is that you will hear a click when the jump ring is closed. Please see the Jump Locks Technique
for more information about this product. Thank you.