ACA1680-6-A. 1600 ft-lb Maximum torque. Triple heat treated Ni-Cr-Mo alloy steel hammer mechanism. Hard hitting twin hammer mechanism. Patented “silencing technology” reduces the noise level to 89 dBA. Patented ergonomically designed handle. Patented easy operation flip lever forward and reverse. The AIRCAT 1680-6-A is a 3/4" Aluminum Impact wrench with a 6" extended anvil to reach Truck Tire Lugnuts. It produces 1600 ft-lbs or torque for stubborn lugnuts. Patented silencing technology lowers exhaust noise to 89 dBA. Patented ergonomic comfort grip. Patented Forward/Reverse Flip Switch. 2 Year Warranty.