All sockets forged from high quality CR-MO steel for long life Heavy duty blow mold case provides durable and convenient storage Fully guaranteed Set Includes: 3/8″, 7/16″, 1/2″, 9/16″, 5/8″, 11/16″, 3/4″, 13/16″, 7/8″, 15/16″, 1″, 1-1/16″, 1-1/8″, 1-3/16″, 1-1/4″, 1-5/16″, 1-3/8″, 1-7/16″, 1-1/2″