Features & Benefits: Patented clutch provides smooth operation and extreme durability Comfort and control with new ergonomic grip and trigger Low air consumption and high torque makes this tool the most efficient in its class Working torque: 25-400 ft./lbs.; Maximum torque: 550 ft./lbs 1300 blows per minute to the 2" extended anvilPacked with power and speed, this economical 1/2" impact wrench is the right tool for general automotive service, body shop, farm and light truck work. Free speed: 7000 RPM; average air consumption: 4.75 cfm; air inlet thread: 1/4" NPTF; minimum hose size: 3/8"; sound dBA: 96; length: 9.1"; weight: 5.85 lbs.