1、

It is suitable medium soft with low compressive strength and harder abrasive stringers,such as hard shale,hard gypsolyte,soft limestone,sandstone and dolomite with stringers,etc.

2-

Our Advantage

---adequate stock
----competitive price
----timely delivery
----factory direct 

3、Packing :wooden case or iron case ,also be packaged according to customer requirements.

Modes of transportation: by sea, by air or land transportation, Of course, a small amount can also by Express.

Cangzhou Great Drill Bit Co.,Ltd was founded in 2010, and the company is located in Hejian Development Zone, Hebei Province.We have multiple international advanced CNC machining center production lines with combined turning and milling and multi-axis linkage. Cumulative sales of more than 100,000 drill bits.Main products: PDC bit, tricone bit, coring bit, bi-center bit, Torkbuster ， PDC reamer, PDC hole opener, rock reamer, customized cutters.