This metric impact socket set features CR-MO alloy steel construction. The sockets have a 1/2 In. drive.
From the Manufacturer
This Sunex 1/2 inch drive standard 14 piece metric impact socket set includes the most common sizes used for automotive repair. It includes 14 metric sockets. It is made of CR-MO alloy steel for long life. It is fully guaranteed and includes a heavy duty blow molded storage case.