... lengths.button bits, cross type bits and chisel bits with(6,7,11,12 degree taper ... toolsButton bit, face design :Flat face, drop centre, Normal and retrac body.tungsten carbide(Buttons):Spherical, ballistic ... ,R25,R28,R32,R38,T38,T45,T51)Shank adapters-carburized and manufactured with tight tolerances ... coal cutter bitsInclude all kinds of round cutter bit and flat cutter bits for excavate coal machine ...