Description This new model redefines the standards set by the classic IRC-231model, with the TwinHammer Plus impact mechanism for morepower, and in-handle exhaust to direct air away from the operatorand the work area. 2? extended anvil for use with flip sockets 470 ft.-lbs. maximum torque Pressure-feed lubrication Reverse bias for 590 ft.lbs. maximum torque in reverse Increased durability, quieter operation More comfortable contoured handle