Makita XDT14Z 18V LXT Lithium-Ion Brushless Cordless Quick-Shift Mode 3-Speed Impact Driver, Tool Only,

Quick-Shift mode selector has an automatic electronic controller that downshifts and reduces rotation and impact speed prior to driving screw into place | Tightening mode (t-mode) for faster tightening of Self-Drilling screws; helps prevent damage to the screw or workpiece | 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 precise fastening control for a wide range of applications | Brushless motor delivers 3, 600 max RPM and 1, 550 in. Lbs. Of max torque | Efficient Brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge