Rock Drilling 15 Inch Tri-Cone Drill Bit IADC 537 Beijing Superior Drilling Equipment Co., Ltd. Base Info Model NO.：15 inchCustomized：CustomizedStandard：AISI, APIMaterial：Tungsten CarbideUsage：Well DrillingTrademark：SuperiorTransport Package：Wooden BoxOrigin：ChinaHS Code：8207199000 Description Pre：Drills for Mining Application DTH Harmmers Next：HDD Pilot Drilling 12 1/4 Inch Milled Tri-Cone Bit IADC127
