Variable 2-speed design (0-550 & 0-1,800 RPM) (0-8,250 & 0-27,000 BPM) covers a wide range of drilling, driving and hammer applications Makita-built brushless motor delivers 970 in.lbs. of Max Torque for up to 70% more power* Efficient brushless motor is electronically controlled to optimize battery energy use for up to 50% longer run time per charge The brushless motor eliminates carbon brushes, enabling the brushless motor to run cooler and more efficiently for longer life The electronically-controlled brushless motor efficiently uses energy to match torque and RPM to the changing demands of the application