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Ko nga paraka porowhara tungsten carbide tere teitei IADC537 5 7/8″ (149mm)
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Paraka toka Tricone IADC537 6 inihi (152.4 mm)
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Moka tricone hurihuri IADC537 6 1/4 inihi (159 mm)
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Paraka toka tricone TCI IADC537 6 3/4″ (171mm)
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Patene API moka IADC537 6.5 inihi (165mm) me te utu whakaheke
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Moka toka TCI IADC537 7 1/2 ” (190 mm)
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API wheketere tricone bit IADC537 7 5/8 ” (193.7 mm)
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TCI tricone bit IADC537 7 7/8 inihi (200 mm)
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Tungsten Carbide Kōkuhu Moka IADC537 8 1/2″(215.9mm)
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Pikitihi API moka poro toka IADC537 8 3/4″(222.2mm) me te utu whakaheke
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TCI drill bit IADC537 9 1/2″(241mm) mo te puna hinu toka maro
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Paraire keri poka toka API IADC537 10 5/8 inihi (269mm)