Flex assembly tools increase productivity and enhance product quality through precision torque control and user comfort. The FlexPower Pulse Tools provide operators with an industry leading power-to-weight ratio, allowing for a smaller tool selection for greater torques giving operators a lighter tool with more torque capability. Built for durability with a superior O-ring design and specially designed pulse fluid FlexPower extends life between regular oil changes and provides more torque stability. Designed to enhance cycle time with high-speed rundown. Note: Recommended air pressure is 85 PSI** (Except for FLEXS-200P & FLEX-200P models should 100 PSI). Use a high quality air filter regulator and lubricator to ensure stable air pressure for optimal performance and for removal of moisture and other potential debris that can reduce the longevity and performance of pneumatic tools. Model:FLEXS-50P Drive Size:3/8" Sq. Dr. Range: 15 - 27 N.m ,11.1 - 19.9 lbf.ft, 1.5 - 2.8 kgf.m. Tool