The Milwaukee M18 Fuel 1/4 in. Hex Impact Driver is the most powerful tool in its class. At 1,800 in-lbs of fastening torque, this tool drives screws faster but also provides greater control over power and speed thanks to its proprietary 4-mode DRIVE CONTROL. The POWERSTATE Brushless Motor delivers up to 0-3,000 RPM with constant power output to drive screws faster. 4-Mode DRIVE CONTROL provides greater control over output speed and power for greater versatility by delivering 0-850 RPM in Mode 1, 0-2100 RPM in Mode 2, and 0-3000 RPM in Mode 3. Self-Tapping Screw Mode is designed to reduce walking when starting self-tapping screws as well as reduce overdriving, breaking, and stripping out screws.