The M18 FUEL™ 1/2 In. Compact Impact Wrench w/ pin detent is the most powerful tool in its class by delivering up to 220 ft-lbs of torque in a compact design. The POWERSTATE™ brushless motor not only provides unmatched power, but also provides greater efficiency, delivering up to 25% more run-time than the leading competitors. REDLINK Plus™ intelligence is the most advanced electronic system on the market, preventing damage to the tool and battery caused by overloading or overheating. REDLITHIUM™ Batteries (not included) deliver more work per charge and more work over the life of the pack than competitive batteries on the market. The 4-mode DRIVE CONTROL™ provides greater control over output speed and power for greater versatility by delivering 0 to 900 RPM in mode 1, 0 to 1600 RPM in mode 2, and 0 to 2500 RPM in mode 3. Auto shut-off mode intelligently detects when the tool has impacted on a fastener for one second and automatically shuts the tool down, reducing the likelihood of overdriving and damaging materials.