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API saxum altum bene exercendis frenis IADC537 9 5/8″(244.5mm)
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API TCI button frenum IADC537 9 7/8″(250mm) pro cautela bene exercendis
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Gyratorius Button Bit IADC537 3 7/8″ (98mm)
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Tricone Bits IADC537 4 5/8″ (118mm)
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TRICONIUM EXERCITATIO IADC537 4 3/4″ (12.6mm)
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API tricone petra IADC537 5 1/4″ (133mm)
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API petram terebra frenum IADC537 5 1/2 » (139.7 mm) pro bene durum
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API terebro IADC537 5 5/8″ (142.9mm)
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Maximum celeritatem tungsten carbidi terebro IADC537 5 7/8″ (149mm)
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Tricones petrae IADC537 6 pollices (152.4 mm)
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Gyratorius triconus bit IADC537 6 1/4 pollices (159 mm)
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TCI triconium rupium IADC537 6 3/4″ (171mm)