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Biby fandavahana lava-drano namboarina IADC127 14 3/4 "(374mm)
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Ambongadiny tricone bits IADC127 17.5 santimetatra (444.5mm)
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Biby fandavahana simenitra IADC127 4 3/4 in (120mm)
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Bit ho an'ny fandavahana tsara IADC127 3 7/8 ″ (98.4mm)
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API tricone drilling IADC127 4 5/8 inches (118mm) amidy
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Orinasa bits voaisy tombo-kase IADC127 6 santimetatra (152mm)
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Bitika fandavahana lavaka lalina IADC127 12 1/4” (311mm)