1/2" HEAVY DUTY AIR RATCHET SQUARE DRIVER: 1/2" FREE SPEED: 160 RPM MAX. TORQUE: 50 FT-LB SOUND LEVEL: 92 dB(A) VIBRATION: 10.5 M/S2 AIR PRESSURE: 90 PSI AIR INLET: 1/4" NPT AVG. AIR CONS.: 4CFM