MAXDRILL ROCK DRILLING TOOLS: --Integral drill rod (HEX.19MM, HEX.22MM) ... bit(chisel bit, cross bit, button bit ) --Extension drilling tools : thread R22, R25, R28, R32, R38, T38, ... DTH bit(DIA.90MM-DIA.605MM) --Drifting and tunneling tools : thread : R25, R28,R32 ,R35 ,tunnling drill ... rod ,(hex.22x108mm hex.25mm 108mm, hex.25mmx159mm ) --Reaming tools : reaming bit -Shank adptor : for ATLAS COPCO, BOHLER ...