This is an aftermarket magnetic clasp that easily attaches and detaches to the clasp of a necklace. Simply insert it into the clasp of your necklace and it will attach and detach easily with magnets. It can be attached to any necklace with a spring ring or lobster clasp. *When removing the magnet, bend it to remove it instead of pulling it. Pulling it off puts unnecessary stress on the necklace chain itself.* This is a set of two silver clasps.