And you can buy the Sandvik DU411 drilling rig with a submersible pneumatic hammer (ITH), ideal for high-precision clean-up drilling, as well as drilling of technical wells and rising ones. The drills themselves are submersible pneumatic hammers powered by on-board high-pressure screw boosters. Can this ITH submersible air hammer drill drill holes with a diameter of 89 - 216 mm (3 ½ - 8 ½ inches), or can it be converted to a 762 mm (30 inches) rebound drilling configuration?