1/2" impact sockets are commonly used for car maintenance. The torque value is below 3/4" impact sockets. Common impact sockets are 6-pointand deep impact sockets. The Metric sizes range from 8mm to 41mm, and the SAE sizes range from 5/16" to 1-5/8". In addition, there are alloy Wheel Impact Sockets for tires, short impact socket for agricultural workers, and BIT impact socket, etc.