Makita XDT09M 18V LXT Lithium-Ion 4.0Ah Brushless Cordless Quick-Shift Mode 3-Speed Impact Driver Kit (Discontinued by Manufacturer) Quick-Shift Mode selector has an automatic electronic controller that downshifts and reduces rotation BL Brushless Motor delivers 1,550 in 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 Extreme Protection Technology (XPT) is engineered to provide improved dust and water resistance for operation in harsh conditions 3-speed power selection switch (0-1,100 / 0-2,100 / 0-3,600 RPM & 0-1,100 / 0-2,600 / 0-3,800 IPM) provides the user with precise fastening control