Kumihimo Supplies: Your Best Source!
Magnetic converters serve a dual role:
(1) They can convert an existing necklace to a magnetic-closure necklace
(2)You can remove the lobster clasp and they are a magnetic clasp finding to be integrated with end caps in constructing your own clasp set
When used a a converter, it's simple: open your existing clasp, attach whatever your existing clasp (spring, lobster, whatever) to the ring on the converter's magnet set. Then, attach the lobster clasp from the converter to your existing ring on the other side. Now, you have a magnetic clasp and you'll never need to open/close clasps again!