RSI provides Hollow Stem Auger (HSA) drilling capabilities with High Torque CME-75 Rigs. The CME company has set the standard for HSA drilling with its durability and reliability. These high torque rigs (13,000 Ft-Lbs) are outfitted with heavy duty 3.25"-10.25" (i.d.) CME augers. Our rigs come fully equipped with CME auto-hammers for environmental and geotechnical sampling.