Boart Longyear's S250-M3 rock drill is based on the well-established S250 design. It offers advanced noise suppression. According to Boart Longyear, independent testing reported the S250-M3 produced 50-percent (6 dBA) less sound pressure than competitor rock drills. It channels more energy to the face of the rock and less into the body of the driller operating it. Due to reduced amount of energy transferred into the components of the S250-M3, less wear is experienced. In addition, torque is increased by 39 percent and penetration by over 6 inches per minute at 110 psi.