When setting stones, you need equipment that will hold your piece well so you can work.  This ring fixture by GRS is what you need. This unit is designed by world-renowned diamond setter Alexandre Sidorov and mounts directly onto your GRS microblock. The result is limitless options for stone setting rings.  This fixture comes with 2 bell-shaped jaw attachments, horizontal and vertical drawbars, 20 expanding mandrels, and various cones, all in an aluminum tray for safe keeping.  This all-encompassing package is perfect to complete any stone setting job. Order today at Stuller.com/tools.