The JET 400313 is a 3/4″-drive, magnesium-bodied super-duty air impact wrench delivering up to 1,200 ft-lb reverse torque and 1,100 ft-lb forward — ideal for heavy-duty bolt removal and fastening. Its twin-hammer mechanism ensures smooth, balanced impacts while keeping vibration low. At only 11.3 lb and with a 7 CFM air draw, it remains manageable on long shifts.