Hybrid 4-function tool with impact, hammer, driver and drill all in one 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 Hammer Driver-Drill mode features variable 2-speed operation (0-700 & 0-2, 700 RPM) (0-8, 400 & 0-32, 400 BPM)