... tools, mining tools, DTH Drilling tools. construction tools and excavating coal pick cutter tools.1.Integral drill steels(Integral Drill Rods)Shank ... (Down The Hole Drilling)Offer ir hammers,DHD3.5,DHD340a,DHD360,DHD380,and low pressure hammers CIR65a, CIR90, CIR110, CIR150,CIR170etc,DTH drill ... coal bolting rod.6.All kinds of casing bits for shield machine and construction tools.7.Round road planing ...