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Umhlinzeki we-API wezingcezu zokumba kahle zetshe elijulile IADC537 9 5/8″(244.5mm)
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Inkinobho ye-API TCI bit IADC537 9 7/8″(250mm) yokumba umthombo wamatshe aqinile
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I-Rotary Button Bit IADC537 3 7/8″ (98mm)
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I-Tricone Bits IADC537 4 5/8″ (118mm)
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Amabhithi e-Tricone drill IADC537 4 3/4″ (120.6mm)
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I-API trione rock bit IADC537 5 1/4″ (133mm)
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I-API rock drill bit IADC537 5 1/2 ” (139.7 mm) yomthombo oqinile
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I-API drill bits IADC537 5 5/8″ (142.9mm)
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Isivinini esikhulu se-tungsten carbide drill bits IADC537 5 7/8″ (149mm)
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I-Tricone rock bits IADC537 6 amayintshi (152.4 mm)
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I-Rotary trione bit IADC537 6 1/4 amayintshi (159 mm)
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I-TCI trione rock bits IADC537 6 3/4″ (171mm)