Manufacturer | Durofix |
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Place of Business | RANCHO CUCAMONGA, CA, 91730 US |
Part Number | ANI405 |
Product Dimensions | 6.35 x 17.78 x 20.32 cm; 2.59 kg |
Item model number | ANI405 |
Is discontinued by manufacturer | No |
Size | 1/2" |
Colour | Silver |
Style | 1/2" Air Impact Wrench |
Finish | Polished |
Material | Metal |
Power Source | Air Powered |
Torque | 500 Foot Pounds |
Item Package Quantity | 1 |
Air Flow Capacity | 4 Cubic Feet Per Minute |
Capacity Description | 500 ft-lbs |
Head Style | Fixed Square |
Number of Handles | 1 |
Measurement System | Inch |
Included Components | Air Impact Wrench, Air Hose Adapter, Lubricant |
Batteries Included? | No |
Batteries Required? | No |
Battery Cell Type | Alkaline |
Warranty Description | 1 Year Limited Warranty |
Item Weight | 2.59 kg |
Country of origin | Taiwan |
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ACDelco ANI405 1/2-Inch Impact Wrench, 500-Feet Pound
Purchase options and add-ons
Colour | Silver |
Brand | ACDelco Tools |
Material | Metal |
Item length | 184 Millimeters |
Item weight | 2.6 kg |
Item package quantity | 1 |
Head style | Fixed Square |
Finish type | Polished |
Item torque | 500 Foot Pounds |
Operation mode | Pneumatic |
About this item
- Powerful and durable impact mechanism TWIN HAMMER
- Durable aluminum alloy housing
- Forward: 3 speeds; Reverse: 1 speed
- Handle exhaust design
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From the manufacturer


Total Solution in Tools
ACDelco Tools vision is to create quality power tools that make life better for everyone, everywhere, every job, every person, and every community around the world. This motivates us, inspires us to do what we do the best, to make what we make the best. Our goal is to introduce most advanced technologies, from pneumatic to cordless and precision fastening, that strengthen our customers’ ability to compete in any job task.
ACDelco 1/2-inch TWIN HAMMER Impact Wrench Pneumatic Tool Family
You can rely on ACDelco Impact Wrenches to give you the guaranteed performance you need.
Designed and engineered to work hard, our air impact wrenches handle the toughest jobs, offering outstanding value. Industrial professionals will be able to release wheel nuts quickly and easily with our versatile impact wrenches; our impact wrenches are feature-packed, giving you the power and torque you need to easily do your job.
- Well-balanced device in rugged aluminum housing
- Reliable, powerful impact wrench with fast torque build-up.
- Composite Materials (selected models)
- Ergonomically shaped handle
- High-performance impact mechanism with fast build-up of torque.
BUILT FOR THE PROS
1/2-inch Impact Wrench Pneumatic Tool
Built to deliver outstanding performance in any job. With several product lines and a range of different potential configurations, it’s easy to find the right tool for the task. All our products feature an industry-leading combination of performance, ergonomics and durability — everything you need to boost production and keep your team working more efficiently all-day long.
Go Tough and Rugged
Designed to withstand tough use in rugged environments, this impact wrench offers greater efficiency that means less downtime, better tool performance, and less money spent on compressed air.
Different Speed Settings
Available in multiple speeds for each forward and reverse direction, our impact wrench range offers torque outputs to 500 ft-lb. Alloy steel, heat treated, helical gears for maximum durability.
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ANI404
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Customer Reviews |
4.0 out of 5 stars 29
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4.4 out of 5 stars 114
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4.5 out of 5 stars 226
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3.6 out of 5 stars 104
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4.4 out of 5 stars 1,845
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4.3 out of 5 stars 12
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Drive Size | 1/2" Square, Twin Hammer | 1/2" Square, Twin Hammer | 1/2" Square, Twin Hammer | 1/2" Square, Twin Hammer | 1/2" Square, Twin Hammer | 1/2" Square, Twin Hammer |
Speed Options | 3 Forward / 3 Reverse | 4 Forward / 4 Reverse | 6 Forward / 6 Reverse | 3 Forward / 1 Reverse | 6 Forward / 6 Reverse | 4 Forward / 4 Reverse |
Compsite Materials | ✓ | ✓ | no data | ✓ | no data | ✓ |
Max. Torque | 320 ft-lbs (434 Nm) | 750 ft-lbs (1,016 Nm) | 650 ft-lbs (880 Nm) | 650 ft-lbs (880 Nm) | 500 ft.-lbs. (677 Nm) | 750 ft-lbs (1,016 Nm) |
Free Speed | 12,000 RPM | 8,000 RPM | 8,000 RPM | 7,000 RPM | 8,000 RPM | 8,000 RPM |
Air Consumption | 3.9 CFM | 5.8 CFM | 6.3 CFM | 5.8 CFM | 6.3 CFM | 5.8 CFM |
Length | 6-11/16" | 7-1/32" | 7-1/8" | 7-1/32" | 7-1/4 inch | 7-1/32" |
Air Inlet / Pressure | 1/4" NPT / 90 PSI | 1/4" NPT / 90 PSI | 1/4" NPT / 90 PSI | 1/4" NPT / 90 PSI | 1/4" NPT / 90 PSI | 1/4" NPT / 90 PSI |
Weight | 2.64 lbs (1.2 kg) | 4.95 lbs (2.25 kg) | 5.58 lbs (2.56 kg) | 4.95 lbs (2.25 kg) | 5.72 lbs | 4.95 lbs (2.25 kg) |
Product information
Technical Details
Additional Information
ASIN | B0041PGNZQ |
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Customer Reviews |
4.4 out of 5 stars |
鶹 Rank |
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Date First Available | May 5 2013 |
Feedback
Product description
1/2" Composite Impact Wrench with 500 ft.-lbs maximum torque. Powerful and durable impact mechanism TWIN HAMMER.
Safety and product resources
Safety documents
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Customer reviews
Customers say
Customers like the functionality, build quality, and power of the wrench. They mention it works well for backyard mechanics, tire changes, and has plenty of torque for any job. However, some customers have reported that it's quite heavy.
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Customers like the functionality of the wrench. They mention it works well for backyard mechanics, tire changes, and suspension/frame stuff. Some say it's a great product. However, some customers have mixed opinions on its quality.
"Works great. Used it to swap winter tires, and was surprisingly good at removing some stubborn rusted nuts...." Read more
"...but the power is there so very happy that finally, I have a excellent working tool at a good price" Read more
"...Pretty heavy tool, but it works good so who cares? It rips off bolts so fast you won't be holding on to it for long...." Read more
"works well, price point excellent" Read more
Customers like the build quality of the product. They mention it's well-made, durable, and rigid. Some say it's a great product for a mechanic that works at home.
"Best tool" Read more
"Awesome gun, super powerful. Not having a dedicated F and R switch is kind of annoying. I wish I paid attention to that before buying." Read more
"Great product for a Mechanic that work at home" Read more
"...Its quite heavy but also well made, the weight is ok for occasional used but I would choose something light if using daily." Read more
Customers like the power of the wrench. They mention it has plenty of torque for any job and is well-balanced. Some say it's powerful enough to remove stuck on wheel bolts.
"Work very well and has lots of power did a tire change on my truck and car and it work very good" Read more
"...was never good... this is a beast and it's loud as heck but the power is there so very happy that finally, I have a excellent working tool at a..." Read more
"Awesome gun, super powerful. Not having a dedicated F and R switch is kind of annoying. I wish I paid attention to that before buying." Read more
"very good impact gun thanks jeff" Read more
Customers are dissatisfied with the weight of the wrench. They mention it's quite heavy but also well-made.
"...Just too big, heavy, and hard to control for working on stuff in the engine bay. Lugnuts, no problem." Read more
"...Pretty heavy tool, but it works good so who cares? It rips off bolts so fast you won't be holding on to it for long...." Read more
"...Another is it is heavier than my electric impact and it was a high torque impact, about 5-6lbs and this thing is smaller but weighs around the same...." Read more
"...Way off. I weighed this thing at 4.4 kg. This thing is close to 10 lbs!! Air consumption - what 1/2" air gun consumes 17 CFM!?..." Read more
Reviews with images

Good quality
Top reviews from Canada
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- Reviewed in Canada on October 14, 2023Verified PurchaseBought this because for 10 years, I was using a Mastercraft brand air impact and always thought it was not that strong. After reading reviews about this model, I decided to try it..... wow, my Mastercraft was never good... this is a beast and it's loud as heck but the power is there so very happy that finally, I have a excellent working tool at a good price
- Reviewed in Canada on June 13, 2018Verified PurchaseBought a $50 Husky impact from home depot, Couldn't take off lug nuts.
This thing for $69 absolutely ripped lug nuts off that were torqued at 100 foot pounds. Pretty heavy tool, but it works good so who cares? It rips off bolts so fast you won't be holding on to it for long. Works great with my 11 gallon mastercraft compressor. I set the PSI at the regulator to 105 with a 30ft 3/8 air hose.
Edit: Have been using it for 6 months and its been great, the only thing I have found so far it couldn't do is rusty subframe bolts on my PT Cruiser, and I can't blame it because it was really rusty, had to use a breaker bar for that. Removes rusty strut bolts and axle nuts with no problem. I have found the 1st forward speed setting torques to about 100ftlbs on my compressor setup so its perfect for lug nuts.
- Reviewed in Canada on June 13, 2024Verified PurchaseMy electric impact gave out and I’m leaving my workplace so I needed something cheap and effective for my last remaining few months. First thing this thing is LOUD. No muffler whatsoever. Can see straight through it and see ur weights. Upsetting cuz all the oil leaks out after like 2 uses lol. Another is it is heavier than my electric impact and it was a high torque impact, about 5-6lbs and this thing is smaller but weighs around the same. Kinda weird. Takes a lil but it can break away seized nuts. Lug nuts suspension components etc. as a professional tool for years and years I wouldn’t buy this but something with amazing warranty. I wouldn’t even use this for personal use otherwise your neighbours WILL be complaining lol. But if you got a few weeks left before you leave and need something that will get the job done this thing is pretty good at what it does. 4/5 not terrible
- Reviewed in Canada on April 25, 2024Verified Purchaseworks well, price point excellent
- Reviewed in Canada on May 19, 2025Verified PurchaseBest tool
- Reviewed in Canada on July 5, 2023Verified PurchaseNice torque, 135 PSI with 3/8 hose and fittings.......
Nicest part........ is the fwe/rev selector is the variable dial (not 3 and 1 speed ln the description) force for tightening and loosening.
Keep it oiled daily, this will last quite a while.... I've used IR, SnapOn, CH and many other brands over the years.
I like it!
- Reviewed in Canada on May 16, 2025Verified PurchaseAwesome gun, super powerful. Not having a dedicated F and R switch is kind of annoying. I wish I paid attention to that before buying.
- Reviewed in Canada on November 5, 2023Verified PurchaseGreat product for a Mechanic that work at home
Top reviews from other countries
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فطومReviewed in Saudi Arabia on October 19, 2024
5.0 out of 5 stars جميل
Verified Purchaseحلووو
- HarisReviewed in the United Arab Emirates on November 4, 2024
5.0 out of 5 stars Highly recommended!
Verified PurchaseIf you’re in the market for a reliable, powerful, and user-friendly impact wrench, the AC Delco Impact Wrench is worth considering. It strikes an excellent balance of performance and affordability, making it a solid addition to any toolkit. Highly recommended!
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SharonReviewed in Mexico on September 7, 2022
5.0 out of 5 stars Cumple con lo indicado muy fácil de utilizar
Verified PurchaseEs un aparato muy plactico y muy eficiente cumple con lo establecido en la descripción