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API button bit IADC537 6.5 inches (165mm) na may diskwentong presyo
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TCI rock bit IADC537 7 1/2 ” (190 mm)
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API factory tricone bit IADC537 7 5/8 ” (193.7 mm)
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TCI tricone bit IADC537 7 7/8 pulgada (200 mm)
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Tungsten Carbide Insert Bit IADC537 8 1/2″(215.9mm)
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API button rock drill bit IADC537 8 3/4″(222.2mm) na may diskwentong presyo
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TCI drill bit IADC537 9 1/2″(241mm) para sa hard rock oilwell
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API rock well drilling bits IADC537 10 5/8 pulgada (269mm)
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API tatlong cone bit IADC537 11 5/8″(295mm) para sa matigas na balon
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Umiikot na tri-cone bit IADC537 12 1/4″(311mm)
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Metal sealed Far Eastern rock drilling bit IADC537 13 5/8″(346mm)
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API tricone drill bit IADC537 14 3/4″ (374mm) para sa hard rock