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Akụkụ nkume TCI tricone IADC537 6 3/4″ (171mm)
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Button bit API IADC537 6.5 inch (165mm) nwere ọnụ ahịa mbelata
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TCI rock bit IADC537 7 1/2” (190 mm)
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Bit tricone nke ụlọ ọrụ API 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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Ntinye Tungsten Carbide Bit IADC537 8 1/2″(215.9mm)
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Ngwa egwu egwu bọtịnụ API IADC537 8 3/4″(222.2mm) nwere ọnụ ahịa mbelata
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TCI drill bit IADC537 9 1/2″(241mm) maka olulu mmanụ nkume siri ike
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Akụkụ olulu mmiri API IADC537 10 5/8 inch (269mm)
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API cones atọ bit IADC537 11 5/8″(295mm) maka isi ike
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Bit tri-cone na-agbagharị IADC537 12 1/4″(311mm)
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Ihe mkpuchi nkume Far Eastern nke e ji ígwè mechie IADC537 13 5/8″(346mm)