Milwaukee 2101-22 M4 1/4 Hex Screwdriver Kit Review

Disruptive innovation is the philosophy that Milwaukee claims their company is defined by.

They aim to continue to better their products to be able to provide their patrons with durable and reliable products to get things done quicker and easier.

The M4 screwdriver is one of the first products from Milwaukee that uses their innovative Red lithium battery. It features a maximum torque of 44 in. lbs. and a clutch with 21 different settings for better control of the power applications.

The only turn-off of this powerful tool is its price tag. Yes, it is a bit more expensive than other rechargeable screwdrivers out in the market, but with the Milwaukee M4 screwdriver, you cannot go wrong with the quality of the tool.

Milwaukee 2101-22 M4 1/4 Hex Screwdriver Kit W/2 Bat


  • Features 44 inches per pound of torque
  • Has 21-position clutch settings with auto shut-off
  • Comes with a two-speed gearbox: 200 and 600 revolutions per minute
  • Measures 244 mm in length
  • Weighs less than a pound

Our Opinion

The Power and Speed It Delivers

The Milwaukee 2101-22 can deliver a maximum of 44 in. lbs. of torque that is very sensible for a compact screwdriver. It has a two-speed gearbox which can operate at 0-200 revolutions per minute at low-speed setting and 0-600 rpm at high-speed setting.

The power and speed of this model from Milwaukee make for a high performing screwdriver. It will be able to handle more than just removing screws from toys. It can assemble and disassemble your furniture, install shelving and curtain rods, and other light to moderate tasks in and around your house.

It Uses the Innovative Red Lithium Battery

The 2101-22 screwdriver uses Milwaukee’s battery technology innovation. Milwaukee introduced the new batteries in 2010 It replaced their previous line of M12 and M18 lithium-ion batteries.

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Apparently, Milwaukee teamed-up with people from MIT to develop the Red lithium battery. The company did not really make the actual battery cells; they just made the actual battery pack better.

In battery innovation, the battery pack construction, the lithium-ion cells in the pack, and the electronics within the are the three major things to consider. To avoid overcharging of batteries which may cause it to get damaged, Milwaukee’s smart Red lithium-ion batteries have constant communication with the charger.

This communication also happens during the actual use of the tool to prevent overheating of the battery and eventually cause both the battery and the motor of the tool to get damaged. It also no longer requires you to fully discharge the battery to be able to maximize the battery’s full capacity.

The thermal protection in the Red lithium batteries lets the battery stay cooler longer before it gets cut off. This means that you can use the power tools with Red lithium batteries for much longer especially since power tools need to operate continuously to finish the job.

Compared to the older batteries used in Milwaukee tools, the Red lithium batteries have 40% more run-time, 20% more speed, 20% more torque, and fade-free power. According to the company, you will be able to drill about 200 holes using the M4 before the battery completely drains. These packs can also run 20% cooler, can be recharged 50% more, and does not suffer from memory effect.

Added Features

The M4 2101-22 mode is very compact. It only weighs under 1-pound and measures 244 millimeters. It packs a lot of power for such a small and lightweight tool. It also uses a ¼” chuck.

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This screwdriver is perfect for easy one-handed operations, and the chuck size makes for quick bit changes.

Covered by 5-year Limited Warranty

We always consider the warranties whenever we are looking to buy techie products. We consider it as the backup plan in case we end up spending our hard-earned money on a product that did not even make the purchase worth the cash. It is our assurance that we will not be wasting away the money we cracked our backs to earn.

Milwaukee offers a five-year limited warranty for the M4 2101-22. The company will repair or replace an electric power tool when it is deemed faulty after careful examination by Milwaukee.

The tool should be brought to an authorized service center to be checked-up before they replace or repair your tool as long as the damage is within the terms and conditions of the warranty.

The warranty will be voided if the cause of the defects of the item is due to normal wear and tear and the recklessness and negligence of the user. If your item had been subjected to abuse, accidents, mishandling, alterations, and lack of maintenance, then your tools will no longer be covered by the warranty.

The warranty will only cover your products if it became defective within five years from the date of purchase. Proof of purchase needs to be presented along with the faulty product; warranty registration is not necessary.

If you do not have the official receipt, then the manufacturing date will determine whether you can avail the warranty.

Comparison with Dewalt DCF610S2

Let’s compare this Milwaukee tool with the Dewalt DCF610S2 Screwdriver Kit. It has a 1,050 max RPM and 15 clutch settings. Its compact design makes it perfect for those tight and cramped spaces. It has three LED lights to guide you through.

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The DCF610S2 has a greater max torque than the 2101-22 M4, although the latter has more clutch settings for better control.

The former, for its price, is covered by a three-year warranty, two years less than what the Milwaukee tool has. Both products have their own highs and lows, and each bests the other in some respects.


If you are seeking for a reliable tool that will keep up with your normal day-to-day tasks, the Milwaukee 2101-22 M4 is the tool for you.

It is compact and lightweight, so it is perfect for small and tight spaces, and it would not weigh you down during overhead applications. It is the kind of high-quality and high-performing tool that every household should have.