... can manufacturer the best quality DTH drill bit, DTH hammer and chisel bit, thread button bit. Now we ... can supply 90mm-254mm(3.5"-10") DTH hammer, 340,350,360,380, COP44, COP54, COP64 ... , COP84 , 3"-8" DTH hammer, 340,350,360,380 4",5",6",8" quick hammer with very good price ... 15510ZRC150G136613921051.0-2.523 (at 1.7Mpa)10-28API(3 1/2" REG152-20311ZRC150G136613761051.0-2.523 (at ...