This Chicago Pneumatic 3/8in. heavy-duty quiet air ratchet is lightweight and well balanced. Noise can be adjusted as low as 79 dBA. Highest torque in its class. Features new Tri-Spring antislip ratchet head. Average Air Consumption (CFM): 4, Case Included: No, CFM at Load: 4, Drive (in.): 3/8, Min. Hose Size (in.): 3/8, Noise Level (dB): 79, Reversible: Yes, Speed - No Load (RPM): 190, Inlet Size (in.): 1/4, Max. Torque (ft.-lbs.): 90, Variable Speed: Yes, Tool Length (in.): 12, Tool Weight (lbs.): 2.7