... service life DTH drill rods1,Top-hammer drilling tools including thread button bits(R25,R28,R32, ... ST58, ST68, GT60), coupling, taper rods and bits, Speed rods/MF rods, extension rods, shank adapter ... etc3,Drag bits including Step and Chevron types with "API Reg", "NRod" thread.Claw tybe bits, Clay bits,etc4,Diamond ... ,WG,etc), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor ...