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API tri côn did IADC537 11 5/8″ (295mm) ar gyfer ffynnon galed
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Did tri-côn cylchdroi IADC537 12 1/4″(311mm)
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Darn drilio creigiau Dwyrain Pell wedi'i selio â metel IADC537 13 5/8″(346mm)
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Bit dril tricone API IADC537 14 3/4″ (374mm) ar gyfer craig galed
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Drilio did rholer tricone IADC537 15.5″(393.7mm) ar gyfer ffynnon ddwfn
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Did drilio TCI IADC537 16″(406.4mm)
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Carbid Twngsten Mewnosod did tricone IADC537 17.5″ (444.5mm)
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API & ISO tricone roller did IADC537 26″(660.4mm)