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Zobowola zakuya IADC127 13 5/8 ” (346mm) zili mgulu
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Customizedl bwino kubowola bits IADC127 14 3/4 ” (374mm)
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Yogulitsa tricone bits IADC127 17.5 mainchesi (444.5mm)
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Tricone rock bits IADC137 6 mainchesi (152mm) pobowola bwino
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API tricone kubowola pang'ono IADC215 8.5 mainchesi (215.9mm) zogulitsa
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API Tricone rock bits IADC215 12 1/4 ” (311mm) ndi mtengo wotsika
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API kubowola pang'ono fakitale IADC216 4.5 mainchesi (114mm)
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Wothandizira ma roller cones IADC216 5 5/8 mainchesi (143mm)
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Zomata zodzigudubuza IADC216 5 7/8 mainchesi (149mm)
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Tizilombo togaya dzino IADC216 mainchesi 6.5 (165mm) pobowola bwino
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Tricone bits mu stock IADC216 6 3/4 mainchesi (171mm)
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Kubowola kwa API IADC216 7 5/8 mainchesi (194mm) popangira mafuta