Button bits,rock drill,threaded,tapered,drilling tools,drill bit,drill bits,rock drilling tools,rock drilling tool, Button bits: Tapered ... , 34mm, 36mm, 40mm, 42mm, 44mm and so on with different degree taper) Thread Button Bits (33mm, 35mm, 45mm to 89mm, 102mm and ... so different degree Thread for example: R22, R25, R28, R32, R38, T38, T45, T51 ...