Needed it to fix a broken bracelet. This little clasp is awesome!

Your 12mm clasp is only 2mm wide. Not silver. This means it is not true silver but probably a silver coat. Do not buy.

These little clasps look professional and grip securely. They have matching bumps and indentations to resist pulls on the strands of a necklace or bracelet. I wish they came with split rings or lobster clawclasps already attached to the ends.

But still soooooooo much easier than before. Makes it so much easier for me to fasten my chain-especially with not so nimble fingers.

Magnet is pretty snug! These magnetic clasps are compact yet very strong. Look great and erases your fear of your jewelry falling off. The claps is just the right size.