Series (IADC) Comparison
IADC Comparison
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IADC 537Y
5 Series
Soft Rock
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IADC 547Y
5 Series
Medium-Soft Rock
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IADC 617Y
6 Series
Medium Rock
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IADC 637Y
6 Series
Medium-Hard Rock
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IADC 737Y
7 Series
Hard Rock
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IADC 837Y
8 Series
Extra-Hard Rock
For sizes and series not listed, please contact us for availability.