TAISHAN button bit is ones of our rock drillign tools , our button bit include tapered button bit and thread button bit , 7°11°12° button bit is our main products ,the button we can provide 6 button ,7 button and 8 buttons the hole inside is 22mm or 25mm ,match the hex drill rod together to dill all kinds of rock ,we put to use the perfect tungsten carbide and steel ,the quality is the better than others ,
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