TAISHAN 11 degree button bit most of the drill bit is 50mm long ,and matched the hex 22 and hex25 drill rod , we have difference material to make the button bit ,the processing techniques we use CNC to control the quality of the button bit , the hardness of the button bit body is controled between 42-45HRC,the carbide we have a few of type , conical button ,ballistic button and parabolic button ,the perfect tungsten carbide to make sure the quality of the button bit ,make it wearing resistance good and best suited to hard ground and abrasive to very abrasive
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