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API telo cones bit IADC537 11 5/8″(295mm) ho an'ny lavadrano mafy
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Bitika tri-cone mihodina IADC537 12 1/4″(311mm)
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Biby fandavahana vatolampy Far Eastern voaisy tombo-kase IADC537 13 5/8″(346mm)
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API tricone drill bit IADC537 14 3/4″ (374mm) ho an'ny vato mafy
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Tricone-roller bit drilling IADC537 15.5″(393.7mm) ho an'ny lavaka lalina
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TCI fandavahana bit IADC537 16″(406.4mm)
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Tungstène Carbide Ampidiro tricone bit IADC537 17.5″ (444.5mm)
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API & ISO tricone roller bit IADC537 26″(660.4mm)