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I-API izigaxa ezintathu zincane IADC537 11 5/8″(295mm) ngokuqinile kahle
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Ibhithi ye-tri-cone ejikelezayo IADC537 12 1/4″(311mm)
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Insimbi evaliwe ye-Far Eastern rock drilling bit IADC537 13 5/8″(346mm)
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I-API tricone drill bit IADC537 14 3/4″ (374mm) yetshe eliqinile
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I-Tricone roller bit drilling IADC537 15.5″(393.7mm) yomthombo ojulile
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I-TCI drilling bit IADC537 16″(406.4mm)
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I-Tungsten Carbide Faka i-tricone bit IADC537 17.5″ (444.5mm)
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I-API & ISO trione roller bit IADC537 26″(660.4mm)