This stone setter's package is put together by renowned diamond-setter Alexandre Sidorov, based on his years of experience setting stones and teaching his skills to other jewelers. This package includes all the components you need to set stones like a pro. The Alexandre ring fixture mounts directly to the GRS® MicroBlock, allowing you to position rings precisely in place. The fixture features a pair of bell-shaped jaw attachments designed to enhance the function of the vertical and horizontal drawbars. The set comes with two drawbar sizes to accommodate rings of almost any width. The vertical ring holder features a spherical base that permits multi-axis movement for superior access to the surfaces you are working on. The fixture also includes two full 10-piece expanding mandrel sets organized in a high-quality aluminum tray. This package also includes a GRS MicroBlock.