Bosch IWMH182-01 18V Brushless Impact Wrench with 1/2" Square Drive, 2 Batteries, Charger, and Carry Bag 18-Volt brushless motor offers 2X life versus conventional motor Electronic Motor Protection (EMP) protects motor against overload for longer life Balanced construction offers less fatigue for every day jobs and in difficult applications Compact and lightweight design allows tool to be used in more applications Bosch exclusive three LED design provides maximum illumination of work area without shadows