... 3:ISO Certificated 4:Long service life DTH drill rods1,Top-hammer drilling tools including thread button ... bits, Speed rods/MF rods, extension rods, shank adapter, etc2,DTH drilling tools including Air DTH hammer ... 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 ... .), Rebar rock bolting, Friction bolting. etc. Drill rod