7 1/2 (190.5mm) IADC227 3 Cone Milled Tooth Bit

China 7 1/2 (190.5mm) IADC227 3 Cone Milled Tooth Bit, Find details about China 3 Cone Milled Tooth Bit, TCI Bit from 7 1/2 (190.5mm) IADC227 3 Cone Milled Tooth Bit