Haojiang Drilling Service Co., Ltd
Established in 1956, HJD BITS was one of the earliest enterprises in China to produce tricone bits. HJD BITS is engaged in R&D and sales of various series of Tungsten Carbide Insert Bit, Steel Tooth Bit, Single Cone Bit, Single Piece Engineering Bit, HDD Hole Opener and PDC Bits etc. Product specifications cover 3 7/8”-26” with ISO90