Bosch IWMH182B Bare-Tool 18V Brushless Impact Wrench with 1/2" Square Drive 18-Volt EC Brushless motor offers 2 times 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 Three LED design provides maximum illumination of work area without shadows