At only 244 millimeters in length and under one pound, the M4 Screwdriver is easy to use with one hand, featuring 1/4 in. quick-change chuck for one-handed bit changes. This tool brings 44 in-lbs. of peak torque and a 21-position clutch with auto shut-off, the new screwdriver offers improved torque control during repetitive jobs. Two speeds, 200 and 600 RPM, offer added user control for precision work. Drilling more than 200 holes per charge, the M4 Screwdriver is the first tool to have Milwaukees RED LITHIUM 2.0 battery on the new M4 platform, offering up to 50 percent more runtime.