Extra Heavy Duty 1" Impact Wrench. This 1" square drive impact wrench has a durable "rocking dog" clutch assembly which makes it ideal for tire work. Teasing throttle for easy bolt and nut starting. Handy side handle for improved tool control. Convenient reverse valve for easy directional changes. Average air consumption: 12 cfm @ 90 psi. Ultimate torque: 1400 ft. lb. Weight: 27 lb. 1 year limited warranty.