JAT-104, 1/2" Impact Wrench

JAT-104, 1/2" Impact Wrench

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JAT-104, 1/2" Impact Wrench

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Product Manual


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The JET JAT-104 doesn't just get the job done, it does it when others can't. With 900 ft.lbs. of torque, it's like picking up your 3/4" drive impact but without all the weight at just 6 lbs. This tool is great for General maintenance, vehicle repairs, body shop work


  • Twin Hammer impact mechanism delivers balanced power
  • Ergonomically designed grip absorbs vibration and reduces hand fatigue
  • Lightweight aluminum construction reduces weight
  • Easily adjustable, 3-position forward power setting
  • Performace @ 90 PSI. Air Inlet NPT 1/4". Min Hose Size 3/8"


  • Square Drive (In.) 1/2
  • Working Torque (Ft.) (Lbs.) 50-700
  • Max Torque (Ft.) (Lbs.) 900
  • Free Speed (RPM) 9,000
  • Blows Per Minute (BPM) 1,300
  • Impact Mechanism / Clutch Type Twin Hammer
  • Bolt Capacity (In.) 9/16
  • Anvil Retainer Type Ring
  • Air Inlet (NPT/In.) 1/4
  • Air Hose (ID/In.) 3/8
  • Air Pressure (PSI) 90
  • Air Consumption (CFM) 6
  • Sound Pressure (db) (A) 87
  • Sound Power (db) (A) 98
  • Vibration Value (m/s²) 12
  • Overall Length (In.) 7-3/8
  • Weight (Lbs.) 6

Warranty Information


JET warrants every product it sells. If one of our tools needs service or repair, one of our Authorized Service Centers located throughout the United States can give you quick service. In most cases, any of these JPW Industries Authorized Service Centers can authorize warranty repair, assist you in obtaining parts, or perform routine maintenance and major repair on your JET tools. For the name of an Authorized Service Center in your area call 1-800-274-6848.


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