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 In. Hammer Driver-Drill (0-500 & 0-2, 000 RPM) with BL™ Brushless Motor delivers 530 in. lbs. of max torque; weighs only 4.2 lbs. with battery
Variable speed impact driver (0-3, 400 RPM & 0-3,600 IPM) with BL™ Brushless Motor delivers 1,500 in. lbs. of max torque; weighs only 3.3 lbs. with battery