From the Manufacturer
The Chicago Pneumatic 3/8-Inch Drive Quiet Air Ratchet features low noise operation and high torque performance.
The adjustable noise control offers levels as low as 79 dBA.
The Tri-Spring ratchet head delivers 10 to 90 ft./lbs.
of working torque at 90 psi.
Lightweight and well-balanced, the ratchet operates with a 0.5 HP motor that uses only five CFM of air.