The Ko-ken RS3440A/8 3/8" Square Drive Universal Socket Set is an 8-piece collection designed for versatility and efficiency in fastening applications. This set includes 6-point universal sockets in sizes 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", and 3/4", all securely mounted on a 200mm rail for easy organization and access. The universal design features a U joint that allows for a degree of rotation, enabling these sockets to engage with a variety of fastener shapes and angles, making them ideal for diverse tasks. Engineered for durability and reliable performance, this universal socket set is a valuable addition to any toolbox, ensuring effective and efficient operation for professionals.