Product Specifications
8 1/2''
                        Customized
                        AISI, API
                        Taper-length
                        Center Drill Bit
                        High Carbon Steel
                        Well Drilling
                        Drilling Tool
                        Forging
                        High-Efficiency ,Wear Resistant
                        Journal /Roller Bearing Bit
                        Medium Hard Formation
                        LONGYUE
                        Wooden Case
                        Hebei, China
                        8207199000
                        

