Disclosure
This website is a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.
When you’re shopping for a light-duty impact wrench, you’re really deciding between the Muylux 4.0Ah Battery Cordless Impact Wrench and the Robustrue Cordless Impact Wrench. The Muylux brings 320Ft-lbs of torque to the table, while the Robustrue steps up with a hefty 590Ft-lbs and a brushless motor.
This comparison is for DIYers and home mechanics who want to swap tires or tighten bolts without breaking the bank. The real trade-off is raw power versus price, and I’ve dug through the specs to help you pick the right one for your garage.
🏆 Quick Picks — My Top Recommendations
Best Overall: Robustrue Cordless Impact Wrench
Delivers 590Ft-lbs torque with 2x 4.0Ah batteries and 4 sockets included — Check Price →
Runner-Up: Muylux 4.0Ah Impact Wrench
Lightweight 5-pound design with 320Ft-lbs torque, perfect for basic tasks — Check Price →
I’ve lined up the specs that actually matter for light-duty work so you can see side by side exactly where these two impact wrenches differ.
Full Specs Comparison
| Specification | Muylux 4.0Ah Battery Cord | Robustrue Cordless Impact |
|---|---|---|
| Torque | 320Ft-lbs | ✅ 590Ft-lbs |
| Voltage | ✅ 20V | — |
| Battery Capacity | ✅ 4.0Ah | 4.0Ah |
| Battery Included | 1 Battery | ✅ 2 Batteries |
| Charger Included | — | ✅ Yes |
| Brushless Motor | ✅ Yes | ✅ Yes |
| Chuck Size | ✅ 1/2 inch | 1/2 inch |
| Speed | — | ✅ 2800RPM |
| Material | ✅ Alloy Steel | — |
| Item Length | ✅ 12 inches | — |
| Item Weight | ✅ 5 pounds | — |
| Sockets Included | — | ✅ 4 Sockets |
| Color | ✅ Yellow | — |
The big gap is torque — the Robustrue’s 590Ft-lbs is nearly double the Muylux’s 320Ft-lbs, which makes all the difference when you hit a stubborn lug nut.
Individual Product Breakdown
I spent time digging through the specs, customer feedback, and real-world numbers on both of these impact wrenches so you don’t have to. Here’s my honest take on each one based on what actually matters for light-duty work.
Muylux 4.0Ah Battery Cordless Impact Wrench
320Ft-lbs (430N.m) | 20V Brushless | 12 inches | 5 pounds
- Powerful Performance with High Torque: This cordless impact wrench offers...
- Versatile 1/2 Inch Drive: The 1/2 inch impact wrench is perfect for both...
- Cordless Convenience for Mobility: Say goodbye to tangled cords! This...
The Muylux is a solid budget pick that gets the job done for basic tire swaps and light automotive work. It’s got 320Ft-lbs of torque and a brushless motor, which is plenty for lug nuts that aren’t seized. At 5 pounds and 12 inches long, it’s easy to handle in tight spots, but if you’re facing rusted bolts, you’ll wish you had more muscle. This one’s best for occasional DIYers who want something affordable without going overboard on power.
✅ Pros
- Lightweight at 5 pounds, easy to maneuver
- Brushless motor for better efficiency at 320Ft-lbs
- Alloy steel build feels durable for the price
- 600+ bought in past month shows popularity
❌ Cons
- Only 320Ft-lbs torque — struggles with stubborn bolts
- Rated 4.1 stars from 219 reviews, lower than competitor
- Comes with just one battery, no charger included
Robustrue Cordless Impact Wrench
590Ft-lbs (800N.m) | 2800RPM | 2x 4.0Ah Batteries | 3.7 pounds
- 800N.m High Torque and Brushless Motor: Impact wrench delivers a maximum...
- 2x 4.0 Ah Battery and 1H Quick Charge: The Robustrue electric impact wrench...
- 3 Adjustable Speed Control: The 1/2 impact wrench features a bottom switch...
The Robustrue is the clear winner here, and it’s not even close. With 590Ft-lbs of torque and a top speed of 2800RPM, it breezes through lug nuts that would stall the Muylux. It only weighs 3.7 pounds, which is lighter than the Muylux despite having way more power — that’s impressive. You get two 4.0Ah batteries, a charger, four sockets, and a tool case right in the box. The 4.5-star rating from 1,360 reviews tells me real users are happy with it, and I can see why.
✅ Pros
- 590Ft-lbs torque handles tough bolts with ease
- 3 adjustable speeds up to 2800RPM for control
- Includes 2x 4.0Ah batteries, charger, and 4 sockets
- Lighter than Muylux at 3.7 pounds despite more power
Reverse auto-stop mode takes getting used to
Which One Should You Buy?
I’ve tested the specs on both of these impact wrenches, and honestly, the right pick depends on what you’re actually doing with it. If you’re a weekend warrior who only touches lug nuts a few times a year, your needs are way different than someone who’s constantly in the garage.
Muylux 4.0Ah Battery Cordless Impact Wrench is right for you if…
- You only need to remove tires a few times a year and want something light at 5 pounds
- Your budget is tight and 320Ft-lbs is enough for well-maintained bolts
- You prefer a compact 12-inch tool that fits easily in tight wheel wells
Robustrue Cordless Impact Wrench is right for you if…
- You deal with rusted or over-torqued bolts and need 590Ft-lbs to break them free
- You want a complete kit with 2x 4.0Ah batteries, charger, and 4 sockets right out of the box
- You value the 3-speed control up to 2800RPM for precision on different fastener sizes
❌ Who Should Skip All of These?
If you’re a professional mechanic using your tool daily for hours on end, neither of these is going to cut it — you’d be better off with a pneumatic impact wrench or a higher-end cordless model. These are light-duty tools, and pushing them past their limits will just frustrate you.
For the vast majority of home users and DIYers, my clear recommendation is the Robustrue. The 590Ft-lbs of torque gives you real confidence on stubborn bolts, and the included batteries and sockets make it a complete package that’s actually lighter than the Muylux at 3.7 pounds. It’s worth the extra money for the peace of mind alone.
Frequently Asked Questions
Which is better for light-duty work, the Muylux or the Robustrue?
For light-duty work, I’d still pick the Robustrue because it gives you so much more headroom. The 590Ft-lbs of torque versus the Muylux’s 320Ft-lbs means you won’t get stuck on a slightly rusted bolt that should be an easy job. Plus, the Robustrue is actually lighter at 3.7 pounds, so you’re not trading comfort for power.
Is the Robustrue worth the extra money over the Muylux?
Yes, absolutely, and here’s why — the Robustrue comes with 2x 4.0Ah batteries, a charger, and 4 sockets included in the box. The Muylux only includes one battery and no charger, so you’d have to buy those separately anyway. When you factor in what you get, the price gap shrinks a lot, and you’re getting nearly double the torque at 590Ft-lbs.
Which impact wrench has more torque for removing car tires?
The Robustrue wins this one hands down with 590Ft-lbs (800N.m) of torque compared to the Muylux’s 320Ft-lbs (430N.m). That’s almost double the breaking power, which matters when you’re dealing with lug nuts that have been torqued down hard or have started to rust. For tire removal specifically, the Robustrue will make your life much easier.
How do the weights compare between the Muylux and Robustrue?
Surprisingly, the Robustrue is lighter at 3.7 pounds even though it has more power and comes with two batteries. The Muylux tips the scales at 5 pounds, which is noticeably heavier. If you’re going to be holding this thing up over your head or working in awkward positions, the Robustrue is going to be more comfortable.
Which one has better customer reviews?
The Robustrue has a clear edge here with a 4.5-star rating from 1,360 reviews, while the Muylux sits at 4.1 stars from 219 reviews. Both have over 600 units bought in the past month, so they’re both popular. But the higher rating and larger review count on the Robustrue tells me it’s more consistently delivering on expectations.
Can the Muylux handle the same jobs as the Robustrue?
For simple tasks like swapping tires on a sedan or tightening furniture bolts, the Muylux’s 320Ft-lbs will get the job done. But the moment you hit a seized bolt or work on a truck with heavier torque specs, the Muylux will struggle while the Robustrue at 590Ft-lbs powers through. If you want one tool that won’t leave you stranded, the Robustrue is the safer bet.
My Final Verdict
The Robustrue Cordless Impact Wrench is my clear winner for light-duty work. It delivers 590Ft-lbs of torque versus the Muylux’s 320Ft-lbs, yet it’s lighter at 3.7 pounds and comes with two batteries, a charger, and four sockets right in the box. The Muylux is a decent budget option for occasional tire swaps, but the Robustrue gives you nearly double the power for a price that’s still reasonable.
If you’re sitting on the fence, here’s what should clinch it — the Robustrue’s 4.5-star rating from 1,360 reviews tells you real buyers are happy with it, and it’s rated higher than the Muylux’s 4.1 stars. You’re getting more torque, more accessories, and better customer satisfaction. Don’t overthink this one.
Winner: Robustrue Cordless Impact Wrench
- 800N.m High Torque and Brushless Motor: Impact wrench delivers a maximum...
- 2x 4.0 Ah Battery and 1H Quick Charge: The Robustrue electric impact wrench...
- 3 Adjustable Speed Control: The 1/2 impact wrench features a bottom switch...
This is for anyone who wants a complete kit that handles stubborn bolts without breaking a sweat. The 590Ft-lbs torque and 2800RPM top speed make it the clear choice for light-duty work with room to spare.
Runner-Up: Muylux 4.0Ah Battery Cordless Impact Wrench
- Powerful Performance with High Torque: This cordless impact wrench offers...
- Versatile 1/2 Inch Drive: The 1/2 inch impact wrench is perfect for both...
- Cordless Convenience for Mobility: Say goodbye to tangled cords! This...
This is for budget-focused DIYers who only tackle basic tire changes and don’t mind the lower 320Ft-lbs of torque. It’s a fine starter tool, but you’ll hit its limits on tougher fasteners.
As an Amazon Associate I earn from qualifying purchases at no extra cost to you.