"(P)" denotes 3/8" drive for US-LT60P Series Torque Reaction Bar Standard with US-LT60P Series Provides a precise shut-off to the preset torque. The clutch mechanism shuts off the air supply when the desired torque level is met, preventing over-torque. This also instantly signals the end of the cycle to the operator The torque reaction felt when proper torque is reached is minimized by the innovative clutch design. Also, this series of tools operates far from the upper range of the power curve, maintaining maximum speed during rundown, even at higher torque Continuous drive clutch provides fast operation for hard and soft joints Designed to reduce overall weight and length by as much as 30% over conventional tools Wide variety of speed and torque Oil free rotor blades provide a clean, slick-free environment. This is especially important for applications where air quality is important Easy to operate reverse button makes disassembly simple Each model is equipped with its standard clutch spring Additional clutch spring specifications available Recommended air pressure: 85 psi