Key components of an air impact wrench include a motor, an anvil, and a hammer mechanism. The compressed air is directed into the motor, which drives the hammer mechanism. The hammer then delivers rapid blows to the anvil, creating the torque needed to turn the fastener.

Air impact wrenches are commonly used in automotive and industrial applications where a high level of torque is required. They are known for their speed and efficiency, making them suitable for tasks such as changing vehicle tires, assembling or disassembling machinery, and other applications where manual effort may be impractical or time-consuming.