Using this product was a pain.

Magnet is strong. Does the job but a lil heavy. One downside is that the closure is kinda heavy for thinner chains so it drags the necklace down a little bit.

Although the clasps function as intended, the weight of the magnet and clasp itself pulls the necklaces to drape in the back. This clasp is heavy and didn't actually solve the problem of tangled chains.