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Nā ʻāpana ʻeli lua pōhaku API IADC537 10 5/8 ʻīniha (269mm)
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ʻO ka API ʻekolu cones bit IADC537 11 5/8″(295mm) no ka luawai paʻakikī
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ʻO ka ʻāpana tri-cone e hoʻohuli ana IADC537 12 1/4″(311mm)
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ʻŌmole wili pōhaku hikina mamao i hoʻopaʻa ʻia me ka metala IADC537 13 5/8″(346mm)
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ʻO ka ʻeli ʻana o ka ʻāpana wili Tricone IADC537 15.5″(393.7mm) no ka lua hohonu
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ʻO ka ʻāpana wili TCI IADC537 16″ (406.4mm)
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ʻO ka ʻāpana tricone hoʻokomo ʻo Tungsten Carbide IADC537 17.5″ (444.5mm)
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ʻO ka ʻāpana wili tricone API & ISO IADC537 26″(660.4mm)