Corded impact wrenches plug into an outlet and are used to drive and remove fasteners. Corded tools allow longer run times than cordless tools for applications where portability isn't a concern. Impact wrenches have a square drive and use impact-rated sockets. They combine a hammer-like impact with high rotational torque to drive and remove fasteners. The impact force is initiated when resistance with the fastener is detected. The impact is delivered in bursts to minimize the stress that the operator feels when handling the tool.