Reverse Circulation Hammer, that we offer, are of, 4 ½’’- 5” bore. We make available JCR Hammer that is designed to use independent rotation and drill in rock with 4 ½’’ to 8” for several formations. This Reverse Circulation Hammer is suitable high pressure air also. Reverse Circulation Hammer performs efficiently at high pressures like 350 PSI and above, and is suitable where back pressure or high water yields is encountered. Our Reverse Circulation Hammer Is Used For Drilling Exploratory Wells In Open Pit MinesCoal Pit MinesCoalQuarries