The K-Tool International 1/2" Drive Composite Impact Wrench, No. KTI81635, offers the best power-to-weight ratio of all high-powered impacts, according to the company. It features a twin hammer mechanism that offers up to 1,350 ft-lbs of breakaway torque. The wrench's body is made of lightweight aluminum for user comfort, and it includes an exhaust handle to direct airflow away from the user and work area. The KTI81635 also has a variable speed trigger with three forward torque settings and a full-power reverse setting.