Air-powered impact wrenches connect to a pressurized air supply to drive and remove fasteners in high-volume, high-torque applications, such as assembly and automotive work. Impact wrenches combine a hammer-like impact force with the rotational force of a wrench to install or remove stubborn or stuck fasteners. They have a square drive and use impact-rated sockets. Air-powered tools are lighter and have fewer moving parts than corded and cordless tools, making them a good choice for extended run times when workers handle the tools for long periods of time.