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Umzi-mveliso we-API we-roller cone bit IADC637 3 7/8″ (98mm) kwisitokhwe
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Umboneleli wamaqhosha amaqhosha IADC637 7 7/8 ” (200mm)
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API trione rock bits IADC637 9 5/8 ” (244.5mm) kwisitokhwe
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I-TCI trione bit IADC617 6 1/2″ (165mm) yesixhobo sokomba
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Umboneleli we-API wamasuntswana okugrumba amatye anzulu IADC537 9 5/8″(244.5mm)
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API TCI iqhosha kancinci IADC537 9 7/8″ (250mm) yokomba etyeni eliqinileyo
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IBit yeQhosha elijikelezayo IADC537 3 7/8″ (98mm)
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Amasuntswana e-Tricone IADC537 4 5/8″ (118mm)
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Tricone drill bits IADC537 4 3/4″ (120.6mm)
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API trione rock bit IADC537 5 1/4″ (133mm)
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API rock drill bit IADC537 5 1/2 ” (139.7 mm) for hard well
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API drill bits IADC537 5 5/8″ (142.9mm)