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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)
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API tolu cones bit IADC537 11 5/8″(295mm) mo vaieli malo
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Lisi tolu-kono bit IADC537 12 1/4″(311mm)
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u'amea fa'amaufa'ailoga ma'a pito i sasae mamao IADC537 13 5/8″(346mm)
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API tricone drill bit IADC537 14 3/4″ (374mm) mo papa malo