Integral Drill Rod

1.material used the same with international famous brand 2.process using the same as the international famous brand "drilling method" process 3.the overall heat treatment to ensure the quality of drill rod the taper size accurately, ensure to mach with the taper drill bit 4.according to testing quality in hard granite,each one rod can be used for7-10days lifetime,quality much better than other brand rod,near the internation rod atlas and sandvik.