Bosch Power Tools deliver stronger performance and lasting reliability. The Bosch 24618-01 18V 1/2 In. impact wrench offers the most compact design for increased maneuverability in tight spaces and extended comfort. It comes with two FatPack Lithium-ion advanced technology batteries that combines Electronic Cell Protection, a unique battery pack design and customized electronics to deliver optimal battery life and performance. Bosch 18V Batteries equipped with Coolpack Technology provides better performance from tools in extreme heat and frigid temperatures.