1.coal mining tools 2.ore mining, many type 3.good price,high ... taper rods in most lengths.A comprehensive range of button bits, cross bits and chisel bits with (6, ... : Flat face, Drop centre, Normal and Retrac body.Tungsten carbide (Buttons): Spherical, Ballistic and Conical. (Threaded R32, R38 ... of round cutter bit and flat cutter bits for excavate coal machine as the replacements of kennametal. Such ...