MAXDRILL ROCK DRILLING TOOLS: --Integral drill rod (HEX.19MM, ... bit(chisel bit, cross bit, button bit ) --Extension drilling tools : thread R22, R25, R28, R32, R38, T38 ... tools : reaming bit -Shank adptor : for ATLAS COPCO, BOHLER ,FURUKAWA, INGERSOLL -Coupling : R22, R25, R38, T38, T45, T51 -Self-drilling ... ,R32S, R38N,R51L,R51N,T76N,T76S) -Self-drilling rock bolt accessories: (coupling, nut, plate, steel ...