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 14k Gold-filled with very powerful magnets Made in in the USA, and much better quality and finish than that of competing look-alikes. and because we use a bigger Spring-Ring clasp they can be attached (or detached) to just about any necklace quickly and easier than that of our competition. 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. Regarding GOLD-FILLED, its made with thin sheet of real gold bonded to another metal (mostly Brass) and its much, much better than plating and it should last for years, but its not permanent as solid gold and will eventually wear out.. This Clasp is the sma