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API founisè nan twou wòch byen fon perçage IADC537 9 5/8 "(244.5mm)
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API TCI bouton ti jan IADC537 9 7/8″ (250mm) pou twou wòch difisil byen
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Rotary bouton Bit IADC537 3 7/8″ (98mm)
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Tricone Bits IADC537 4 5/8″ (118mm)
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Tricone drill bits IADC537 4 3/4″ (120.6mm)
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API tricone wòch ti jan IADC537 5 1/4″ (133mm)
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API wòch fè egzèsis ti jan IADC537 5 1/2 "(139.7 mm) pou pi difisil
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API fè egzèsis moso IADC537 5 5/8″ (142.9mm)
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Gwo vitès tengstèn carbure perçage Bits IADC537 5 7/8″ (149mm)
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Bits wòch trikon IADC537 6 pous (152.4 mm)
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Rotary tricone bit IADC537 6 1/4 pous (159 mm)
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Bits wòch TCI tricone IADC537 6 3/4″ (171mm)