... . Available in all sizes 3:ISO Certificated 4:Long service life DTH drill rods1,Top-hammer drilling tools including ... etc3,Drag bits including Step and Chevron types with "API Reg", "NRod" thread.Claw tybe bits, Clay bits ... ,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 ...