If there is one tool that defines the pace of a professional automotive shop, it is the air impact gun. Removing lug nuts, breaking loose rusted bolts, pulling apart suspension components tasks that would take several minutes by hand happen in seconds with the right impact gun. The difference between a gun that delivers consistent torque and one that bogs down or strips fasteners is felt on every single job.
Drive size is the main variable that determines which impact gun belongs on which job. Smaller drives handle lighter work with more control, while larger drives are built for the high-torque applications that come with heavier vehicles and larger fasteners. Most shops run more than one size because the right tool for a lug nut is not always the right tool for a driveshaft bolt.
