... price Type:Drill Bit Description of the product Size7 7/8"(200.0mm)ModelHA 737GIADC737WOB(KN/mm)0.70-1.20RPM ... , 617G, 627G, 637G9 1/2241.3437G, 517G, 537G, 547G, 617G9 5/8244.5437G, 517G, 537G, 547G, 617G9 7/8250.8437G, 517G ... , 637G17 1/2444.5517G, 537G, 617G, 627G, 637G 7 7/8" Kingdream HA737G tungsten carbide tricone drill bit /three cone bit