... .Sturdy & effective for rock drilling 2. Available in all sizes 3:ISO Certificated 4:Long service life DTH drill rods1,Top-hammer ... ,T2,T6,WF,WG,etc), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor system( anchor ... bits, nut, plate,coupling.), Rebar rock bolting, Friction bolting. etc. Drill rod