Model No. : YKB-HDD22
Hole opener-Fixed Name: Hole opener drilling bit
IADC code:217,327,437,517,537, 617, 637, 737, etc
Sizes range: 8" to 62 " and customized according to drawings or requirements.
Pilot size:5 1/2",6 1/2",8 1/2",12 1/4" etc.
Bearing type:Sealed or Open...
Click for details