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Àwọn ìdìpọ̀ apata TCI tricone IADC537 6 3/4″ (171mm)
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Bọtini API IADC537 6.5 inches (165mm) pẹlu idiyele ẹdinwo
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Àpáta TCI IADC537 7 1/2” (190 mm)
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Ẹ̀rọ API tricone bit IADC537 7 5/8” (193.7 mm)
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TCI tricone bit IADC537 7 7/8 inches (200 mm)
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Àfikún Túngsten Carbide IADC537 8 1/2″(215.9mm)
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Bọtini apata API IADC537 8 3/4″(222.2mm) pẹlu ẹdinwo owo
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Béètì ìlù TCI IADC537 9 1/2″(241mm) fún ibi epo àpáta líle
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Àwọn ìdìpọ̀ ìwakọ̀ kànga apata API IADC537 10 5/8 inches (269mm)
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API mẹta cones bit IADC537 11 5/8″(295mm) fun kanga lile
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Bit tri-cone tí ń yípo IADC537 12 1/4″(311mm)
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Iṣẹ́ ìwakọ̀ àpáta Far Eastern tí a fi irin ṣe IADC537 13 5/8″(346mm)