HART’s 20-Volt Brushless Impact Driver Kit, (1) 20-Volt Lithium-Ion 2.0Ah Battery, Gen 2 boasts up to 3,000 RPM and up to 2,200 in-lbs. of torque to handle most every driving job you’ll ever come across. Where does this power come from? In 3 words: Brushless Motor Technology. Using the same 20V HART battery, the Brushless motor is up to 20% faster than the previous generation Brushless Impact Driver.