When you think about 4 volt tools you usually think of Ryobi's 4V Tek platform, which is a good platform for the home owner. Well, now Milwaukee tool is sharing some 4V love with the M4 screwdriver for the pro. This pocket driver for the pro is quite handy to have around. Like the DeWALT DCF680 that we just recently reviewed, this is designed for those light duty jobs like trim plates and ceiling boxes, and even cabinets. Anywhere precision is needed and a standard 18V or even 12V is overkill, the M4 is the tool to use.
The 2101-22 has 2 configurations, a pistol grip mode and a straight shaft mode for getting into those really tight areas. One thing that the M4 is lacking, that is kind of a big deal, is an LED light. It really needs an LED light! A few times I found myself lacking light and didn't have a flashlight with me. The unit has momentary, a forward and reverse switch. There is no variable speed here. It's either 200 or 600 RPM, depending on what speed you have it on, 1 or 2. The unit puts out 44 in lbs of torque which will drive a 3″ screw through a 2×4. There's more than plenty of power for all the tasks you can throw at it.
The one-handed 1/4 hex will also hold 1″ bits. Power can be controlled by the 21 clutch settings. I really liked the clutch feature. It powers off after it clutches out in forward. This gives it a really precise, quality feel. In reverse it works like any other driver clutch. 2 batteries come with this kit and the included charger will charge them in about 45 minutes. A fuel status gauge built into the side of the tool will keep you up to date on your charge status. Overall, the M4 is a great tool for those who need a precise, small driver.