Being able to have different beads on a necklace or bracelet is a very nice way to add personality to a necklace or bracelet. This is why a person should definitely consider purchasing these cute heart slide charms for their beading supplies. One cool thing about this slide charm is that it is designed to move back and forth over the chain or cord that is placed on. This allows for the jewelry to feel more natural, and it also makes sure that the charm will be in the middle of the jewelry. This heart slide charm is made out of metal, and it is the perfect thing for a crush or friend. Metal. 6mm with a 3 mm hole. Use with small slide charm bands/bracelets on our website for proper fit.