Makita XT248M 18V LXT Lithium-Ion Brushless Cordless Combo Kit, 2-Piece (Discontinued by Manufacturer) Kit Includes Brushless Hammer Driver-Drill, Impact Driver and 2 ea. 18V LXT 4.0 Ah Batteries 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 Variable 2-speed 1/2" Hammer Driver-Drill (0-400 & 0-1,550 RPM) with BL Brushless Motor delivers 530 in.lbs. of Max Torque