Model # HSTC4140

Internet # 100678421

Air Tool 1/2 in. Impact Wrench

$99.97 /each

Frequently Bought Together

Product Overview

The STC International Air Tool 1/2 in. Impact Wrench features a pin clutch-type hammer that produces up to 550 ft.-lb. of torque with minimum vibration. All critical components are heat-treated and shotpeen-hardened for strength and durability. The premium Super-Quiet muffler system helps dampen impact noise.

  • Pin clutch-type hammer produces up to 550 ft.-lb. of torque with minimum vibration
  • Selectable power control knob
  • Critical components are heat-treated and shotpeen-hardened
  • Premium super-quiet muffler system dampens noise
  • 1/4 in. NPT plug
  • Swivel air inlet

Info & Guides

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Air Inlet Size 
Drive Size (in.) 
Product Depth (in.) 
Product Height (in.) 
Product Length (in.) 
Product Width (in.) 


Air Tool Type 
Impact Wrench 
Air consumption at recommended operating pressure (CFM) 
Amperage (amps) 
Case Included 
Color Family 
Color Family 
Compressor/Air Tool Features 
No Additional Features 
Cord Length (ft.) 
Corded Tool Type 
Impact Wrench 
Cordless/ Corded 
Forward/Reverse Rocker Switch 
Housing Material 
Impacts Per Minute 
No additional components or accessories are included 
Maximum Speed (rpm) 
Maximum torque (ft.-lb.) 
Power Tool Product Type 
Product Weight (lb.) 
4.85 lb 
Project Type 
Recommended operating pressure (psi) 
Tool weight (lb.) 
Tools Product Type 
Air Tool 
Variable power settings 

Warranty / Certifications

Certifications and Listings 
No Certifications or Listings 
Manufacturer Warranty 
2 Year Limited Warranty 

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Customer Questions & Answers

1 Question1 Answer

Customer Questions & Answers

Air Tool 1/2 in. Impact Wrench
Air Tool 1/2 in. Impact Wrench

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What country are they made in?

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April 6, 2016
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April 8, 2016
This item is made in the US.
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Customer Reviews

Rated 3.8 out of 5 by 22 reviewers.
Rated 5.0 out of 5.0 by Works like a Champ! I bought this tool in the spur of the moment for a car project I was working on. I was skeptical how good of an air tool it was for the price but was very pleasantly surprised. For the DIY, or the guy who likes to work on your owns cars periodically the tool is a winner. It packs plenty of power to handle some of the toughest jobs, but this is all dependent on your air supply. Use an air compressor that is rated for 4.5 CFM at 90 PSI and you will be fine. The other factor to keep in mind is the hose. Use a 3/8" hose at a moderate length. December 29, 2014
Rated 5.0 out of 5.0 by 1/2 air impact wrench Works great. It will break bolts if your not carefull October 28, 2014
Rated 1.0 out of 5.0 by junk I lived with gun for about a year, the switch would not work. I had to tap it to get it to switch from forward to reverse. I tried it on my friends compressor thinking I did not have enough air ,no good . I bought a new 60 gal compressor thought now I got enough power, still did not work right. Well last night it finally broke on the end where the fitting goes in, now I can go by a real impact wrench. Not a Husky June 18, 2014
Rated 5.0 out of 5.0 by Perfect impact for the homeowner. Breaking those tight bolts on my zero-turn mower blades was easy with this impact. I am very pleased with it. If it holds up over the years, it will turn out to be a BARGAIN! July 8, 2014
Rated 5.0 out of 5.0 by Awesome First impact wrench I've ever had. Does every thing I need it too. Lots of power broke lug nuts loose no problem. Will be buying more husky air tools. July 31, 2014
Rated 5.0 out of 5.0 by Fantastic Product This is a fantastic tool! I have owned it for almost a year and absolutely no problems. I use it to take lug nuts off my wheels and to take my oil plug off and it busts through each and every time. It has great power and good weight to it. The only way anyone would have a problem with it is if you are not doing something properly or if you have air leaking somewhere in the air hoses. Other than that then you are doing something wrong or don't know what you are doing. December 27, 2010
Rated 4.0 out of 5.0 by big bang for the money replaced my CP.MORE powerful ease of use. takes off lug nuts fast .hope it last as long as my old one March 4, 2014
Rated 1.0 out of 5.0 by Don't waste your time or money This thing feels like a solid, well-built tool but looks can be deceiving. I was unable to remove even a single lug nut from either of the front wheels of my car. The nuts had last been tightened using a torque wrench. Just for kicks, I attempted to remove some of the nuts from the lower control arms and end links. No dice there either. This might as well have Fisher Price stamped on the casing. December 11, 2010
  • 2016-07-21 T13:53:02.873-05:00
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