The Ko-ken RS3X00MZ/12 3/8" Square Drive Z-Series Socket Set is a comprehensive 12-piece collection designed for precision and durability. This set features 6-point sockets in sizes 8mm, 10mm, 11mm, 12mm, 13mm, 14mm, 17mm, and 19mm, all securely mounted on a 300mm rail for organized storage and easy access. The Z-Series is known for its tight tolerances and innovative ball-holding groove system, ensuring a reliable grip and enhanced performance. Engineered for both professional and industrial applications, this socket set provides the versatility and strength needed for a wide range of fastening tasks, making it an invaluable addition to any toolbox.