... DTH pipe 3.Certificate: ISO9001of DTH pipe 4.Material:Carbide DTH drill rods1,Top-hammer drilling tools including thread button bits(R25 ... ,T2,T6,WF,WG,etc), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor system( anchor ... , plate,coupling.), Rebar rock bolting, Friction bolting. etc. 76mm DTH Drill rod