The Ko-ken RS4020/6-L60 1/2" Square Drive Bit Socket Set is a high-quality 6-piece collection specifically designed for working with triple square (XZN) fasteners. This set features sockets ranging from M5 to M14, each with a socket length of 60mm, providing versatility for various applications. The sockets are conveniently mounted on a durable 150mm rail for easy organization and quick access. Engineered for optimal performance, this XZN socket bit set delivers excellent torque transfer and minimizes the risk of tool slippage, making it an indispensable tool for professionals in need of reliable fastening solutions.