... 3:ISO Certificated 4:Long service life DTH drill rods1,Top-hammer drilling tools including thread button ... etc2,DTH drilling tools including Air DTH hammer,DTH bits with COP, DHD, QL, MACH, MISSION, SD, XL ... system, etc3,Drag bits including Step and Chevron types with "API Reg", "NRod" thread.Claw tybe bits, ... WF,WG,etc), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor ...