Pros & Cons — The Honest Take

For me, the pros massively outweigh the cons if you work in tight spaces. Just be sure you’re ready to invest in the battery system if you aren’t already on the M12 platform.

⚖️ How Does It Compare?

I chose these two alternatives because they represent different trade-offs. The Seesii is for precision torque work, while the ACDelco is a more traditional, high-torque air tool.

I’d pick the Seesii digital wrench only if your primary need is precision, not speed. Choose the ACDelco air tool if you have a shop compressor and regularly tackle jobs needing more than 220 ft-lbs. For everyone else needing cordless power in tight spots, the Milwaukee is the clear winner.

How It Actually Performs

Power and Torque in Tight Spaces

The 220 ft-lbs of torque is the real deal. I used it on suspension bolts and exhaust manifold nuts that were a real pain, and it zipped them off. The right-angle head was the star, letting me get the socket on bolts where my standard impact just couldn’t fit. It’s not for crank bolts or giant truck lug nuts, but for 90% of confined-space work, the power is perfect.

Maneuverability and Weight

At 2.83 pounds, this tool is a dream to use overhead or in awkward positions. The 14.5-inch length gives you just enough Use without being unwieldy. I could use it one-handed in a tight engine bay to start bolts, which saved my wrists. The compact size means it fits in crowded tool drawers or the side pouch of a tool bag without hogging space.

Battery Life and System

Using the M12 REDLITHIUM HIGH OUTPUT batteries, I got through a full day of intermittent use—breaking loose and fastening maybe 50 bolts—on a single charge. Since it’s part of the M12 system, swapping in a fresh battery takes seconds. The trade-off is clear: you get great portability and light weight, but you need to have a couple of charged batteries ready for big jobs.

Durability and Feel

The alloy steel construction feels incredibly solid. I’ve dropped it from a short height onto concrete and it just got a scuff. The polished finish helps resist grime, and the ratcheting mechanism still works smoothly after months of use. It feels like a professional-grade tool that’s built to last in a greasy shop environment, which matches Milwaukee’s reputation.

Who Should Buy This Generator?

Not every tool is for every job. Based on my time with it, here’s who will get the most value from this wrench and who should probably keep looking.

✅ This Is a Great Fit If You…

• You’re a professional mechanic or plumber who constantly works in tight engine bays, under dashboards, or in cramped plumbing chases.
• You’re already invested in the Milwaukee M12 battery platform and want to add a specialized, high-torque tool to your kit.
• You need serious fastening power (that 220 ft-lbs is real) but in a compact, 2.83-pound package to reduce fatigue.
• You frequently encounter situations where a standard impact wrench simply won’t fit due to its straight design.

❌ You Might Want to Look Elsewhere If…

• Your primary work involves high-torque applications like truck lug nuts or large machinery, where a 1/2-inch drive air tool is standard.
• You don’t own any M12 batteries and aren’t willing to invest in the charger and battery ecosystem just for this one tool.
• You only need an impact wrench for very occasional, light-duty use; a more basic model might be more cost-effective.

My top recommendation is for the working pro who battles tight spaces daily. The Milwaukee Right Angle Impact Wrench solves a specific, frustrating problem with impressive power and reliability.

Common Issues & Fixes

Even great tools can have hiccups. Here are a few things I ran into or heard about, and how to solve them.

Not Enough Power / Stalls Out

The problem: The wrench seems weak or stalls on bolts it should handle.

My fix: First, make sure you’re using a Milwaukee M12 HIGH OUTPUT battery, not an older, smaller one. Also, check that your socket is fully seated on the 3/8-inch drive; a loose connection kills power transfer.

Battery Drains Very Quickly

The problem: The battery doesn’t last as long as you expected during continuous use.

My fix: This is a high-torque tool, so it draws a lot of power. For long jobs, keep a second charged battery ready. Also, avoid using the “hammer” mode to start bolts if you can ratchet them loose first to save battery.

Socket Gets Stuck on the Drive

The problem: The socket won’t come off the square drive after use.

My fix: This is often caused by dirt or lack of lubrication. Keep the drive clean and give it a very light coat of dry lubricant. To remove a stuck socket, use a dedicated socket removal tool or a pair of channel locks with careful pressure.

Ratcheting Mechanism Feels Stiff

The problem: The manual ratcheting function is hard to turn or feels gritty.

My fix: Gunk and metal shavings can get inside. Blow it out thoroughly with compressed air. If it persists, a drop of light machine oil on the ratchet mechanism can help, but avoid over-lubricating.

Warranty & Support

Milwaukee offers a solid warranty, but you need to check the specific terms for this model on their website. For any issues, I found their customer service to be helpful, especially if you have your model number (2564-20) and purchase info ready.

My Final Verdict

After testing it, I think the Milwaukee 2564-20 Right Angle Impact Wrench is a specialist tool that excels at its one job. Its 220 ft-lbs of torque in a 2.83-pound, right-angle package is a big improvement for tight spaces. I’d strongly recommend it to any mechanic or serious DIYer who battles confined areas. I would not recommend it for someone who needs a general-purpose, high-torque wrench for big, open projects.

The main limitation is needing the M12 battery system. If you’re not already invested, that’s an extra cost. But if you are, or if you work in tight spots daily, this tool’s unique capability makes it worth every penny. It’s solved more problems for me than almost any other tool in my box.