These ball chains are made of strong plated metal alloy and are much higher quality than other plastic or nickel-plated chains found elsewhere. Each necklace comes with a connector. Perfect for dog tags, bottle cap pendant necklaces, scrabble tile pendant necklaces, and many other uses! These CleverDelights-brand chains are top-quality and exclusively licensed by CleverDelights for sale on Amazon. Don't get burned by cheap, low-quality imitators. Don't forget the matching CleverDelights pendant trays and glass cabochons for beautiful pendant necklaces, also available from CleverDelights here on Amazon.