Scrap Pdc Drag Drill Bits / Diamond Cut Drill Bits/pdc Rock Drill Bits For Cl...

PDC Three Wings Drag Bit, Scarp Drill Bit for Well Drilling

PDC Three Wings Concave Drill Bit,PDC Concave Bit, Non Core Drill Bit for Mining

PDC Four Wings Concave Drill Bit, Non Coring Bit for Well Drilling