Made in Germany by Josef Bergs Co. This high quality brass open back Sew-On Setting has four holes -1 hole each side. 4 prongs are 2.7mm in length with a high wall of 4.7mm. Designed to hold most ss47/48 Chaton stones. Sold in Raw Brass, These settings can be used for soldering and creating your designs. Ready for plating or use as is. Check out our selection of stones to fit these settings!