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Kaiwhakarato API mo nga paraka keri poka toka hohonu IADC537 9 5/8″(244.5mm)
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moka patene API TCI IADC537 9 7/8″(250mm) mo te keri poka toka maro
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Moka Patene Rotary IADC537 3 7/8″ (98mm)
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Paraka Tricone IADC537 4 5/8″ (118mm)
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Paraka porotaka Tricone IADC537 4 3/4″ (120.6mm)
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moka toka tricone API IADC537 5 1/4″ (133mm)
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API toka drill bit IADC537 5 1/2 ” (139.7 mm) mo te puna maaro
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Paraire poroporo API IADC537 5 5/8″ (142.9mm)
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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)