5 7/8" Tricone Bit Milled Tooth IADC 127 with Metal Sealed Bearing
China 5 7/8" Tricone Bit Milled Tooth IADC 127 with Metal Sealed Bearing, Find details about China Tri-Cone Bit, API Certification from 5 7/8" Tricone Bit Milled Tooth IADC 127 with Metal Sealed Bearing