Ingersoll-Rand 1in. Heavy Duty 6 inch Extended Anvil Air Impact Wrench. Perfect for the demanding world of truck tire and service work, the IR285A-6 model combines exceptional power, durability, and operator convenience with a standard 6 inch extended anvil. It delivers 1,450 ft./Lbs. of maximum torque, with a 5,000 rpm free speed and high efficiency, 6-vane motor. The integral 360-degree swivel inlet makes kinked hoses a thing of the past, and along with the swept-back side handle, provides excellent maneuverability.