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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
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Tricone roller bit vili IADC537 15.5″(393.7mm) mo vaieli loloto
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TCI vili vili IADC537 16″(406.4mm)
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Tungsten Carbide Fa'aofi tricone bit IADC537 17.5″(444.5mm)
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API & ISO tricone roller bit IADC537 26″(660.4mm)