DTH hammer,DTH hammer bit,Down the hole bit,rock drill,rock drilling,overburden bits,Hammer,Drill bit,Hihg air pressure 4High air pressure DTH BitsDTH Bits seriesDrill BitBit Dia.(mm)NO.AirHolesGaugeButtonsFrontButtonsWeight(Kg)Part No.SUG45DHD340ACop44HD45 10526×φ145×φ138.5SD105C4411027×φ146×φ138.8SD110C4411528×φ147×φ139.0SD115C4412028×φ148×φ139.8SD120C4412739×φ149×φ1411.0SD127C44SD410526×φ145×φ ...