Sew-on settings are prong settings that have four lateral setting holes depending on the stone shape. Here at ECB we have Sew-on Square and Round Rivoli Settings. Holes in the lower edge allow you to thread the setting and sew it on. These are custom-fit settings, sure to hold the Rivoli, Chaton or Cushion Cut fancy stone securely. You can choose from Rhodium & Gold Plated finishes.