●The material is zinc alloy. ●Practical Design: These bottle openers are designed in vintage key shape, exquisite and practical, the key bottle openers are not only a bottle opener for you guests, but also a big surprise ●Whether your theme is vintage, classic, rustic or somewhere in between, these party-favors will accentuate almost any style with extra flair. ●Add extra charm to your wedding by gifting these beautiful skeleton keys that are actually bottle openers! ●Specifications: Approximately 6.8 * 2.8cm in length and width