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API khawm ntsis IADC537 6.5 nti (165mm) nrog luv nqi
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TCI pob zeb ntsis IADC537 7 1/2 "(190 mm)
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API Hoobkas tricone ntsis IADC537 7 5/8 "(193.7 hli)
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TCI tricone ntsis IADC537 7 7/8 nti (200 mm)
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Tungsten Carbide Insert Bit IADC537 8 1/2 "(215.9mm)
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API khawm pob zeb laum ntsis IADC537 8 3/4 "(222.2mm) nrog luv nqi
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TCI laum ntsis IADC537 9 1/2 "(241mm) rau pob zeb oilwell
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API pob zeb zoo drilling khoom IADC537 10 5/8 nti (269mm)
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API peb cones ntsis IADC537 11 5/8 "(295mm) rau qhov zoo
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Rotating tri-cone ntsis IADC537 12 1/4 "(311mm)
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Hlau kaw Far Eastern pob zeb drilling ntsis IADC537 13 5/8 "(346mm)
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API Tricone laum ntsis IADC537 14 3/4 "(374mm) rau pob zeb tawv