The Bosch PS42-02 12V Max EC Brushless Impact Driver Kit features a very compact but powerful 1/4 In. hex driver, two 12V Max 2.0 Ah batteries and a charger. The PS42 driver has a 5.5 In. head-length and weighs just 1.6 Lbs., but it is a powerhouse, with an optimized impact system. It also has the Bosch performance control system, which supplies two speed settings, one for high speed and high torque and one for low speed and low torque. This delivers no-load rpm ratings of 0-1,200 and 0-2,600 and no-load impact-per-minute ratings of 0-2,700 and 0-3,100. The drivers produces 975 In.-Lbs. of max torque, great for repetitive driving tasks and about 85 percent of the fastening tasks around the professional jobsite. The tool's EC Brushless motor and improved all-metal gearbox allows for unmatched efficiency, great runtime and longer life. This driver has a 1/4 In. hex drive and a three-LED light ring.