... tools,drill bit,drill bits,rock drilling tools 1. Button bits: Tapered button bits (28mm, 30mm 32mm, 34mm, 36mm, 40mm, 42mm, 44mm ... 115mm, 120mm, to 165mm, 178mm and 270mm and 310mm, The shank can be designed according to different hammer, for example: DHD ... example R22, R25, R28, R32, R38, T38, T45, T51 etc8. Shank AdaptorsShank adaptors-carburized and manufactured with tight tolerances and controlled ...