... comprehensive range of button bits, cross bits and chisel bits with (6, 7, 11, 12 degree taper).Bit diameter: 28mm-57mm. ... T38, T45, T51 ; bit diameter: 45mm-127mm);Couplings sleeves- manufactured with a middle stop to prevent walking along the thread. Include ... R32, R38, T38, T45, T51)Shank adapters - carburized and manufactured with tight tolerances and controlled straightness.4. DTH hammers and DTH ...