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API tres conos bit IADC537 11 5/8″(295mm) pro bene arduo
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Rotatus tri-conus bit IADC537 12 1/4″(311mm)
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Metallum signatum Absit Orientis petram EXERCITATIO frenum IADC537 13 5/8″(346mm)
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API triconum terebra frenum IADC537 14 3/4″ (374mm) saxum durum
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Triconus cylindrus frenum EXERCITATIO IADC537 15.5″(393.7mm) pro alta bene
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TCI EXERCITATIO frenum IADC537 16″(406.4mm)
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Tungsten Carbide Insert tricone frenum IADC537 17.5″ (444.5mm)
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API & ISO triconus cylindrus bl IADC537 26″(660.4mm)