The XDT12M is part of Makita’s expanding 18V Lithium-Ion system, the world’s largest cordless tool system powered by 18V Lithium-Ion slide-style batteries. Makita 18V Lithium-Ion batteries have the fastest charge times in their categories, so they spend more time working and less time sitting on the charger. Precision fastening applications often require the user to stop or slow down the impact driver just prior to driving the screw into place to ensure there is no damage to the fastener or work piece. Quick-Shift Mode™ is an automatic electronic controller that downshifts and reduces rotation and impact speed prior to driving the screw into place. It is engineered to minimize screw thread stripping, screw breakage and damage to work.  The Quick-Shift Mode™ setting can be engaged with a push of a button at the base of the handle.