M18 18-Volt Lithium-Ion Compact Brushless Cordless 1/4 in. Impact Driver Kit with SHOCKWAVE Bit Set (45-Piece)The M18 Compact Brushless 1 4 in. Hex Impact Driver is the industry's fastest 18 Volt compact impact solution. REDLINK electronics and REDLITHIUM batteries deliver 3,200 RPMs for best in class application speed. Brushless motor technology provides 1,600 in. lbs. of torque, more runtime and a more compact tool at 5. 1, which means less trips to the charger and greater access in tight spaces. The Milwaukee SHOCKWAVE 45 piece Impact Driver Bit Set is