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API batani pang'ono IADC537 6.5 mainchesi (165mm) ndi mtengo kuchotsera
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TCI rock bit IADC537 7 1/2 ” (190 mm)
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API fakitale trione pang'ono IADC537 7 5/8 ” (193.7 mm)
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TCI tricone bit IADC537 7 7/8 mainchesi (200 mm)
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Tungsten Carbide Insert Bit IADC537 8 1/2″(215.9mm)
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API batani kubowola pang'ono IADC537 8 3/4″ (222.2mm) ndi mtengo kuchotsera
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TCI kubowola pang'ono IADC537 9 1/2 ″ (241mm) kwa hard rock oilwell
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API rock well kubowola bits IADC537 10 5/8 mainchesi (269mm)
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API cones atatu pang'ono IADC537 11 5/8″ (295mm) molimba bwino
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Kuzungulira katatu koni IADC537 12 1/4″(311mm)
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Chitsulo chosindikizidwa ku Far East pobowola miyala IADC537 13 5/8″(346mm)
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API tricone kubowola pang'ono IADC537 14 3/4″ (374mm) kwa thanthwe lolimba