Makita XWT09Z LXT Lithium-Ion Brushless Cordless High Torque Hex Impact Wrench, 18V/7/16" BL Brushless Motor delivers 590 ft.lbs. of Max Torque 3-speed power selection switch (0-900/0-1,000/0-1,800 RPM & 0-1,800/0-2,000/0-2,200 IPM) provides precise fastening control The BL Brushless Motor eliminates carbon brushes, enabling the BL Motor to run cooler and more efficiently for longer life Efficient BL Brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge The electronically-controlled BL Brushless Motor efficiently uses energy to match torque and RPM to the changing demands of the application