Makita XWT02Z 18V LXT Lithium-Ion Brushless Cordless 3-Speed 1/2-Inch Impact Wrench, Tool Only (Discontinued by Manufacturer) BL Brushless Motor delivers 210 ft.lbs. of Max Torque Efficient BL Brushless Motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge The BL Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life The electronically-controlled BL Brushless Motor efficiently uses energy to match torque and RPM to the changing demands of the application 3-speed power selection switch (0-1,600 / 0-2,100 / 0-2,800 RPM & 0-1,800 / 0-2,600 / 0-3,500 IPM)