1/2" Super-Duty Air Impact Wrench with 2" Extended Anvil The classic IR231 Series has set the standard for impact performance for over three decades . Refined engineering design has perfected the performance that has made the IR231 Series the most popular impact ever, rivaled only by IR’s composite impacts . IR’s elite mechanism is the perfect balance between superior power and proven durability . Featuring a 2” extended anvil with all the performance benefits found in the IR231HA. Ideal for tire changing and use with flip sockets . Handle exhaust directs air away from user . Contoured comfort handle . 590 ft.-lbs. maximum torque . Pressure feed lubrication system 231HA-2