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API konopo e nyenyane IADC537 6.5 lisenthimithara tse (165mm) ka theko theolelo
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TCI rock bit IADC537 7 1/2 ” (190 mm)
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API fektheri 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 konopo ea rock drill bit IADC537 8 3/4″(222.2mm) ka theko e theotsoeng
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TCI drill bit IADC537 9 1/2 ″(241mm) bakeng sa hard rock oilwell
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API likotoana tsa ho cheka seliba sa API IADC537 10 5/8 inches (269mm)
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API li-cones tse tharo li nyane IADC537 11 5/8″(295mm) bakeng sa hantle hantle
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E potolohang tri-cone bit IADC537 12 1/4″(311mm)
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Metal e tiisitsoeng ka tšepe ea Bochabela bo Hōle ea ho phunya mafika IADC537 13 5/8″(346mm)
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API tricone drill bit IADC537 14 3/4″ (374mm) bakeng sa lefika le thata