The KT Pro 1/4" and 3/8" Drive Socket Set, No. A5001CR01, is a starter kit with two drive sizes and a combination of metric and SAE standard sockets in 6 and 12 point sizes. The 3/8" drive sockets include the company's patented grip strip technology that is color coded to easily identify between metric and SAE sockets. A heavy duty metal carrying case is included. This set is backed by a lifetime warranty.