Magnetic Clasps are great for people who have long nails, arthritic or otherwise have difficulty using the regular jewelry clasps. That is if they do what they promise; not lose your necklaces, turn your neck green or cause allergies. This clasp is Sterling Silver with very powerful magnets Made in in the USA, and much better quality and finish than that of competing Chinese look-alikes . With the supplied Jump rings and with the use of one or two pairs of needle nose pliers (better without teeth), they can be attached to just about any light necklace with relative ease The only word of caution is that, the heat from boiling water (150F or above) will diminish the strength of the magnets, so its best to detach them before cleaning your jewelry in ultrasonic cleaners. This Clasp is the smallest magnetic clasp we carry, but you will still be amazed at how strong they are.