Bit Diameter: 270mm(10 5/8")
IADC Code: 635
IADC Code: 845
Bit Diameter: 250mm(9 7/8")
Bit Diameter: 280mm(11'')
IADC Code: 837
Bit Diameter: 270mm(10 5/8'')
IADC Code: 637
IADC Code: 635
Bit Diameter: 270mm(10 5/8'')
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