JMAC Pro-Series 1/2 Twin Hammer Air Impact Gun

Produced in the popular and versatile 1/2″ drive size, this wrench combines a compact size with high performance and is ideal for everything from tire service to spring and frame work to major engine/equipment tear down. Packed with features such as a powerful twin-hammer action for smooth & balanced blows; tuned handle exhaust; pressure fed impact mechanism lubrication; four-position selector switch with three forward speeds and one full power reverse speed; high-visibility rubberized handle grip for comfort and safety; three-piece body design for easy service and repair.


  • 1/2″ Square Drive with Retaining Ring
  • Twin Clutch Hammer for Smooth & Consistent Blows
  • Tuned Handle Exhaust for Reduced Noise
  • Die Cast 3-Piece Aluminum Body
  • High-Visibility Ergonomic Grip for Comfort & Safety
  • 3 Hi-Torque Forward & 1 Full Power Reverse Speed
  • Free Speed: 7000 RPM
  • Impacts Per Minute: 1300 IPM
  • Max Torque: 650 N-M / 480 FT-LB
  • Min. Air Pressure: 90 PSI (6.3 KG/CM)
  • Average Air Consumption: 6 CFM (169 L/M)
  • Includes 1/4″ NPT Male Plug Fitting

Additional information

Weight 6.146 lbs


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