{"product_id":"swiss-fig-77b-cup-burs-4mm-10mm","title":"Swiss Fig. 77B Cup Burs 4.00mm-10.00mm","description":"\u003cp\u003eSwiss Fig. 77B cup burs are designed for rounding, shaping, and smoothing metal edges and prongs with precision control. The cup-shaped cutting head allows you to refine contours and create clean, uniform finishes in precious metals with balanced, consistent performance.\u003c\/p\u003e\n\n\u003ch3\u003eFeatures\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eFig. 77B cup bur profile for rounding and smoothing prongs and edges\u003c\/li\u003e\n\u003cli\u003eManufactured from tungsten vanadium steel for strength and durability\u003c\/li\u003e\n\u003cli\u003ePrecision-made to tight tolerances for consistent cutting performance\u003c\/li\u003e\n\u003cli\u003eLarge diameter sizes ideal for heavier stock and bold settings\u003c\/li\u003e\n\u003cli\u003ePreferred by many jewelers for everyday bench use\u003c\/li\u003e\n\u003cli\u003eSold individually\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eSpecifications\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003eBur Type\u003c\/th\u003e\n\u003ctd\u003eFig. 77B Cup\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eMaterial\u003c\/th\u003e\n\u003ctd\u003eTungsten Vanadium Steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eSize Range\u003c\/th\u003e\n\u003ctd\u003e4.00 mm (0.157 in.) – 10.00 mm (0.394 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eManufactured In\u003c\/th\u003e\n\u003ctd\u003eSwitzerland\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003cth\u003eBrand\u003c\/th\u003e\n\u003ctd\u003eOtto Frei Swiss Burs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAvailable Options\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\n\u003cth\u003ePart #\u003c\/th\u003e\n\u003cth\u003eBur Size\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.386\u003c\/td\u003e\n\u003ctd\u003e8.50 mm (0.335 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.387\u003c\/td\u003e\n\u003ctd\u003e9.00 mm (0.354 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.388\u003c\/td\u003e\n\u003ctd\u003e9.50 mm (0.374 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.389\u003c\/td\u003e\n\u003ctd\u003e10.00 mm (0.394 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.391\u003c\/td\u003e\n\u003ctd\u003e4.00 mm (0.157 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.392\u003c\/td\u003e\n\u003ctd\u003e4.50 mm (0.177 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.393\u003c\/td\u003e\n\u003ctd\u003e5.00 mm (0.197 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.394\u003c\/td\u003e\n\u003ctd\u003e5.50 mm (0.217 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.395\u003c\/td\u003e\n\u003ctd\u003e6.00 mm (0.236 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.396\u003c\/td\u003e\n\u003ctd\u003e6.50 mm (0.256 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.397\u003c\/td\u003e\n\u003ctd\u003e7.00 mm (0.276 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.398\u003c\/td\u003e\n\u003ctd\u003e7.50 mm (0.295 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e118.399\u003c\/td\u003e\n\u003ctd\u003e8.00 mm (0.315 in.)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/table\u003e","brand":"Otto Frei Swiss 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