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API bhatani bhiti IADC537 6.5 inches (165mm) nemutengo wakaderedzwa
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TCI rock bit IADC537 7 1/2 ” (190 mm)
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API fekitori trione bit IADC537 7 5/8 ” (193.7 mm)
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TCI trione bit IADC537 7 7/8 inches (200 mm)
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Tungsten Carbide Insert Bit IADC537 8 1/2″(215.9mm)
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API bhatani dombo drill bit IADC537 8 3/4 ″ (222.2mm) nemutengo wakaderedzwa
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TCI drill bit IADC537 9 1/2 ″(241mm) ye hard rock oilwell
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API rock well drilling bits IADC537 10 5/8 inches (269mm)
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API matatu makoni zvishoma IADC537 11 5/8 ″ (295mm) yakaoma zvakanaka
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Kutenderedza tri-cone bit IADC537 12 1/4″(311mm)
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Simbi yakavharwa Kure Eastern dombo kuchera bit IADC537 13 5/8 ″(346mm)
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API tricone drill bit IADC537 14 3/4″ (374mm) yedombo rakaoma