Model: GW12

Gison GW12 (made in Taiwan) is an air impact wrench.


  • Twin hammer clutch mechanism.
  • Maximum torque: (183Nm).
  • Compact and lightweight.
  • Positive action trigger to control speed.
  • Reversible action.
  • pistol-grip with forward and reverse switch on side.
  • Double hammer mechanism.
  • The trigger has two speeds.


Mechanism Twin Hammer
Square Drive 3/8″
Bolt Capacity 13 mm
Max. Torque 135 (183 Nm)
Net Weight 0.95 kg
Length 135 mm
Air Consumption 0.56 m3/min
Air Inlet 1/4″
Hose Size 6.5 mm
Sound Pressure 88 dBA
Air Pressure 90 psi
Vibration 4.5 m/s2

Additional information

Weight 2 kg

Power Source

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