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Likotoana tsa lebelo le phahameng tsa tungsten carbide drill IADC537 5 7/8″ (149mm)
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Tricone rock bits IADC537 6 inches (152.4 mm)
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Rotary tricone bit IADC537 6 1/4 inches (159 mm)
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TCI trione rock bits IADC537 6 3/4″ (171mm)
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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)