Adjustable Ring Base -- Featuring adjustable design, with a standard inner diameter of 18.5mm/0.73", which can be adjusted to fit most ring sizes, so you don't have to worry about stocking up on multiple sizes. Exquisite Appearance -- The ring blank base is also made of durable brass with Cubic Zirconia inlay process, shinny and chic, allows you to wear these rings directly or making your own style rings, these handmade stackable knuckle rings will make you more charming undoubtedly. DIY Ring Making -- You can add gemstones, cabochons, cameos, stamps, engravings, glue letters, logos, resin, or some small beads to the ring tray to create gorgeous rings or jewelry. Durable Material -- These rings are made of quality brass, which is not easy to tarnish and oxidize, so they can keep long, and the brass claw is much stroner than ordinary metal material. Besides, the polished inner surface and edge, exquisite craftsmanship make them comfortable to wear. Meaningful Gift -- Jewelry is the perfect holiday gift for a sensual surprise. Make a unique jewelry gift for your loved one, lover, girlfriend, wife, fiance, mother, daughter, friend, or even yourself with the Ring Maker Kit.