... DTH Drill tools. Construction tools and excavating coal pick cutter tools, we can also produce other products according to the ... design: Flat face, Drop centre, Normal and Retrac body.Tungsten carbide (Buttons): Spherical, Ballistic and Conical. (Threaded R32, R38, T38, ... rand model etc.5. Excavate coal cutter bitsInclude all kinds of round cutter bit and flat cutter bits for excavate coal machine as ...