DTH drilling rods 1.Sturdy & effective for rock drilling 2. Available in all sizes 3:ISO Certificated 4:Long service life DTH drill rods1,Top-hammer drilling tools including thread button bits(R25,R28,R32,R38,T38,T45,T51, ST58, ST68, GT60), coupling, taper rods and bits, Speed rods/MF rods, extension rods, shank adapter, etc2,DTH drilling tools including Air DTH hammer,DTH bits with COP, DHD, QL, ...