3 Wings PDC Concave Drill Bit Sanmeul Drilling Tools Co., Ltd Base Info Model NO.：PDC Concave Drill BitType：Impact DrillUsage：Well DrillingCertification：APITransport Package：Plastic Box , Carton BoxSpecification：CastingOrigin：China Description Pre：Great Quality Carbide Milling Inserts for Cast Iron Processing Next：Customized Premium Quality Oil Used Tungsten Carbide Insert Cutters
