This copper bezel cup features a decorative, serrated edge and holds one 3mm round cabochon, flat-back stone, or crystal. This bezel is a great choice for jewelry designs made with copper or other base metals. Bezel cups provide an easy way to set your stones and finish with clean lines and professional-looking results. Use with stone or glass cabochons, for flat-back stones or crystals, or with resins to create everything from earrings to cuff links to pendants. Simply solder the bezel cup to a finding or design, and set as desired.