... :R780 4.wall thickness :5mm,5.5mm,6mm DTH drill rods1,Top-hammer drilling tools including ... ST58, ST68, GT60), coupling, taper rods and bits, Speed rods/MF rods, extension rods, shank adapter, etc2,DTH drilling tools ... ), reaming shell, core barrel and drill rods.etc.5,Rock anchor tools, IBO anchor system ... ( anchor rods, anchor bits, nut, plate,coupling.), Rebar rock ...