The MILWAUKEE M12 FUEL 1/4 -inch Hex Impact Driver outputs over 1,300 -inch lbs. of torque, is only 5.1-inch in length and delivers up to 0-3,300 RPM with constant power output. 4-Mode DRIVE CONTROL provides users with greater control over output speed and power for greater versatility by delivering 0-1,300 RPM in Mode 1, 0-2,400 RPM in Mode 2 and 0-3,300 RPM in Mode 3. Mode fours Self-Tapping Screw Mode is designed to reduce overdriving, breaking and stripping out screws. The M12 FUEL 3/8 -inch Stubby Impact Wrench is the industries most compact impact wrench measuring only 4.8 -inch in length, delivers an industry leading 250 ft.-lbs. of breakaway torque, removing even the most stubborn bolts and fasteners. 4-Mode Drive Control, will allow unmatched control in various fastening applications. 1-3 RPM allows for precision control, and Auto-Shut Off Mode in the 4th setting will prevent over fastening of bolts while doing reassembly work.