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API knop bit IADC537 6,5 inch (165mm) mei koarting priis
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TCI rotsbit IADC537 7 1/2 "(190 mm)
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API fabryk tricone bit IADC537 7 5/8 "(193.7 mm)
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TCI tricone bit IADC537 7 7/8 inch (200 mm)
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Tungsten Carbide Insert Bit IADC537 8 1/2 "(215.9mm)
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API knop rotsboar IADC537 8 3/4 "(222.2mm) mei koarting
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TCI drill bit IADC537 9 1/2 "(241mm) foar hurde rots oaljewell
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API rotsboarringsbits IADC537 10 5/8 inch (269mm)
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API trije kegels bit IADC537 11 5/8 "(295mm) foar hurde put
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Rotearjend tri-kegelbit IADC537 12 1/4 "(311mm)
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Metaal ôfsletten Far Eastern rotsboarring IADC537 13 5/8"(346mm)
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API tricone drill bit IADC537 14 3/4 ″ (374mm) foar hurde rock