The Mac Tools 15-PC. 3/8 Drive SAE and Metric Speed Allen Hex Bit Set is a high-quality set of sockets designed for automotive use. This set includes both SAE and metric sizes ranging from 5/16in. Providing versatility for various applications. Made in the United States with a chrome surface finish, these sockets are durable and reliable for professional mechanics and DIY enthusiasts alike. The 3/8 drive size and hex/allen drive type ensure a secure grip on nuts and bolts, making it a valuable addition to any tool collection.