... DTH Drill tools. Construction tools and excavating coal pick cutter tools, we can also produce other products according to the ... , face design: Flat face, Drop centre, Normal and Retrac body.Tungsten carbide (Buttons): Spherical, Ballistic and Conical. (Threaded R32, R38, T38, ... controlled straightness.4. DTH hammers and DTH bits (Down The Hole Drilling)Offer IR hammer, DHD3.5, DHD340a, DHD360, DHD380, ...