In difficult situations when a standard socket wrench is proves ineffective, an impact wrench, its power tool version, can help save the day. An impact wrench converts a straight line hammer impact into rotational force that can be used to turn fasteners like bolts and screws with the aid of impact sockets. These wrenches are used in a number of industries, such as product assembly, automobile repair, major construction projects and almost any other work that requires high torque for reduced task completion time. The impact sockets required are made from highly malleable metals for shatter-resistant performance. This is because the high strength fasteners can cause standard sockets to shatter with the high torque needed for turning them.