... Sturdy & effective for rock drilling 2. Available in all sizes 3:ISO Certificated 4:Long service life DTH drill rods1,Top- ... bits,etc4,Diamond core drilling tools including the diamond core bit(BQ,NQ,HQ,PQ,TT,T2,T6,WF,WG, ... etc), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor system( ... , nut, plate,coupling.), Rebar rock bolting, Friction bolting. etc. Drill rod