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Air impact wrenches also referred to as pneumatic wrenches, impact guns, and air wrenches, are air-driven socket wrench tools used to tighten and remove fasteners such as nuts. They are designed to produce high torque with a hammer-like impact force that makes them ideal in various machinery, automotive repair, and assembly applications. Unlike their electric counterparts, air impact drills do not overheat since any heat generated is cooled by the circulating compressed air. Air impact wrenches normally come in ½” square drives.