3/8" Drive Heavy Duty Air Impact Wrench features: Working torque: 5-50 ft./lbs.; maximum torque: 75 ft.-lbs.; blows per minute: 1620; average air consumption: 2.5 cfm; air inlet thread: 1/4" NPTF; minimum hose size: 3/8"; sound dBA: 84.1. Free speed of11,000 RPM. Rocking dog clutch with oil lubrication for long life and durability. Great tool for small engine repair, bench work and transmission and has built-in power regulator.We ship APO, FPO and combine shipping.