Product Specifications
517/537/637
                        Customized
                        API
                        1
                        Roller Cone
                        Tungsten Carbide
                        Well Drilling, Metal Drilling
                        Cusomized
                        Different (Ex:517/537/637)
                        Soft-Hard
                        Superior
                        Wooden Box
                        China
                        82071910
                        

