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Wodzigudubuza kubowola pang'ono IADC637 4 5/8″ (118mm)
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Tricone roller bit IADC637 4 3/4 ″ (120mm) pobowola mwala wolimba
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Mpira dzino trione biit IADC637 5.5 ″ (140mm)
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API fakitale ya TCI trione biit IADC637 6 “(152.4mm) mu katundu
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API TCI trione rock bit IADC637 6 3/4″ (171.4mm)
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Mtengo wa API Tricone IADC637 8 1/2 ” (215.9mm)
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Kubowola kozungulira pang'ono IADC617 12 1/4 mainchesi (311mm)
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API trione kubowola bits wopanga IADC637 12 1/4 ” (311.1mm)
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Chitsulo chosindikizidwa kubowola pang'ono IADC637 14 3/4 ” (374.6mm) pachitsime chakuya
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Ma cones atatu bit IADC637 17 1/2 ” (444.5mm)
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Tricone bits supplier IADC637 6.5 mainchesi (165mm) pa hard rock
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Zozungulira zozungulira IADC637 9 7/8 ” (250.8mm)