The MILWAUKEE M18 Compact Brushless 1/4 in. Hex Impact Driver is the fastest 18v compact impact solution in its class. The brushless motor technology is optimized for the impact driver, providing 1,600 in-lbs. of torque and more runtime. The compact motor also makes the brushless impact driver smaller at 5.1 in, increasing battery life and improving access to small and tight spaces. Built-in MILWAUKEE REDLINK electronics optimize the way the REDLITHIUM batteries work with the hardware of the impact driver, delivering 3,400 RPM's for best in class application speed and performance. The Compact Brushless 1/4" Hex Impact Driver works with all M18 batteries so you can work harder for longer.