18v, lxt, 1/2″, square drive, lithium-ion, brushless cordless high torque, impact wrench, tool only, no battery or charger included, brushless motor delivers 740 ft/lb max torque & 1,180 ft/lb, nut busting torque, 3 speed 0-900/0-1,000/0-1,800 rpm & 0-1,800/0-2,000/0-2,200 ipm for precise fastening control, 1/2″ anvil with friction ring for quick & easy socket changes, efficient brushless motor electronically controlled to optimize battery energy use for up to 50% longer run time per charge, motor eliminates carbon brushes enabling to run cooler & more efficiently for longer life, electronically controlled motor efficiently uses energy to match torque & rpm to changing demands of application, compact & ergonomic design at only 9″ long, weighs only 7.9 lb with battery not included, for reduced operator fatigue.