Ingersill-Rand 231A 1/2" impact gun
The Ingersoll Rand 231A air impact wrench has a 1/2-inch drive size, a working torque range of 425 ft-lbs, a gratis speed of 8,500 rpm, and a weight of 5.8 lbs. It uses a trigger actuation with a pistol configuration. The maximum pressure is 90 psig/6.2 bar. The air inlet thread size is 1/4-inch NPTF, and the minimum hose size is 3/8-inch. Here's a more detailed look at the specifications: Drive Size: 1/2-inchMaximum Torque: 600 ft-lbsWorking Torque Range: 25-350 ft-lbsFree Speed: 8,000 rpmWeight: 5.8 lbsAir Consumption: 4.2 cfm (average), 22 cfm (at load)Sound Pressure/Power: 99/110 dBAAir Inlet: 1/4-inch NPTFMinimum Hose Size: 3/8-inchI would highly advocate purchasing air tool oil to keep it running tip top. Recently tested on lug nuts and works flawless.