T38 76mm Rock Mining Drill Thread Button Drill Bit
Besides, we can design customized thread button drill bits according to different drilling application, and custom drill bits are applicable to drill soft rock, loose-medium rock and hard rock. Rock Drill Thread Button Bits is suitable for R25, R28, R32, R35, R38, T38, T45, T51, ST58, T60 rock drill rods use.
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