The Mac Tools 12V Max 1/4" BL Impact Driver, No. MCF801, measures 5.05" and weighs 1.77 lbs. Its BL-SPEC brushless motor delivers 200 ft-lbs breakaway torque. The tool features impact assist three-speed switch technology for forward and reverse control as well as a 1/4" drop and load hex for quick bit changes. It also offers a three LED ring, stainless steel mesh vents for durability, and R-SPEC glass-filled nylon housing for solvent resistant durability.