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Fandavahana mitondra tombo-kase bts IADC126 9 7/8 santimetatra (250mm)
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Tricone drill bits mpamatsy IADC126 12 1/4 in (311mm) ho an'ny fandavahana
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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)
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Diamond tricone bit IADC216 7.5 santimetatra (190mm)
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Tricone bits orinasa IADC216 9 7/8 santimetatra (250.8mm)