The superior mechanics and internal mechanisms of the AirCat mini air ratchet includes high-quality bearing surfaces, air chambers and turbines. The patented exhaust muffler/filter technology reduces the level of noise while retaining more power and torque. Operating PSI 90, Speed - No Load RPM 320, Drive in. 1/4, Inlet Size in. 1/4, Tool Weight lbs. 1.6, Average Air Consumption CFM 3.5, Max. Torque ft.-lbs. 35, Noise Level dB 82.