This model redefines the standards with the Twin Hammer Plus impact mechanism for more power, and in-handle exhaust to direct air away from the operator and the work area. Pressure feed lubrication. Reverse bias for 590 ft.-lbs. maxiumum torque in reverse. Increased durability, quieter operation and more comfortable handle. IR231H-2 has all the features of the IR231C with the addition of a 2” extended anvil for use with flip sockets - making it a superior tool for tire changing.