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Tungsten carbide drill bits IADC537 5 7/8″ (149mm)
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Tricone papa maa IADC537 6 inisi (152.4 mm)
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Rotary tricone bit IADC537 6 1/4 inisi (159 mm)
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TCI tricone rock bits IADC537 6 3/4″ (171mm)
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API fa'amau bit IADC537 6.5 inisi (165mm) ma tau fa'aitiitiga
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TCI papa papa IADC537 7 1/2 ” (190 mm)
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API falegaosimea tricone bit IADC537 7 5/8 ” (193.7 mm)
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TCI tricone bit IADC537 7 7/8 inisi (200 mm)
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Tungsten Carbide Fa'aofi Bit IADC537 8 1/2″(215.9mm)
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API fa'amau vili papa ma'a IADC537 8 3/4″(222.2mm) fa'atasi ai ma tau fa'aitiitiga
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TCI drill bit IADC537 9 1/2″(241mm) mo le suau'u maa malo
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API vili vaieli papa IADC537 10 5/8 inisi (269mm)