Tungsten Carbide Threaded Button Rock Drill Bits For ...
Besides, we can design customized thread button drill bits according to different drilling application, and custom drill bits are applicable to drill soft rock, loosemedium rock and hard rock. Rock Drill Thread Button Bits is suitable for R22, R25, R28, R32, R35, R38, T38, T45, T51, ST58, T60 rock drill rods use. It have many thread.