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Model: FM2921/FM3921/FMF3921/FMH3921/FMR3921
IADC Code: M443
Size Range (in): 5 6/8, 5 7/8, 6, 6 1/8, 6 1/2, 6 3/4, 8 1/2, 12 1/4
Recommended WOB (lb/in. Diameter): 500-3000
Recommended Rotary Speed (RPM): 60-400
Special Features/Usage: MVW