Stone Setting Burs made by Fox Burs in Germany. Burs are made of Tungsten Vanadium Steel for strength and durability. These fine Tungsten Vanadium Burs are made to the most rigorous quality standards and exceed ISO specifications. Burs are made with the high quality raw materials, in the state-of-the-art facilities. The precise fluting will guarantee the same smooth and even quality cutting and finishing. The Stone Setting burs are pointed with straight sides. These burs are primarily used by Jewelers for Stone Setting, for cutting precise stone seats in prong settings, bezels and for tube settings. NOTE: This is our largest set with a full range of burs smallest 1mm up to 7mm sizes