Hitachi WR16SE Brushless Motor Corded Impact Wrench, 1/2-Inch Brushless motor technology for more power, increased tool durability and maintenance free operation Impressive torque at 270 ft-lbs for maximum power Powerful 1,600 RPM no-load speed and 1,900 IPM to handle stubborn fasteners Large toggle switch to easily transition from forward to reverse Covered in soft, yet durable elastomer for improved durability and a non-slip grip Large bumper protects the tools gear cover Four selectable impact ranges to efficiently match the power to the application Soft start and brake function for more control AC or DC- can be used with a generator Lightweight at only 5.5 lbs for better maneuverability