Loading 1/4" Hex Chuck for bit insertion and release with one hand. Metal Gear Housing for job site durability. Built-in LED for illumination of dark work spots. Variable Speed Trigger for output power control. Over-mold Side and Grip for secure grip and work surface protection The new Milwaukee M12 Screwdriver has the power to drive the majority of common small fasteners, and the run-time of full day screw driving without recharging. The compact size allows the users to work in tight places for increased convenience.