... comprehensive range of button bits, cross bits and chisel bits with (6, 7, 11, 12 ... toolsButton bit, face design: Flat face, Drop centre, Normal and Retrac body.Tungsten carbide (Buttons): Spherical, ... , R28, R32, R38, T38, T45, T51)Shank adapters - carburized and manufactured with tight tolerances and ... coal cutter bitsInclude all kinds of round cutter bit and flat cutter bits for excavate coal machine ...