It is a bit that, when rotated, drills a hole larger than its diameter.
It is including Matrix body and Steel body material .
The Bi-Center Bits provide cost-effective hole opening through installed casing or liner sections.
Engineered cutting structure designed .
High performance cutters from Great factory .
Gauge cutters designed Arc PDC cutters ,which is more abrasive then normal hard alloy gage pads .
Longer working life to save your drilling cost .
Copyright © 2020 CANGZHOU GREAT DRILL BITS CO., LTD All rights reserved.