The Ko-ken RS4400LH/6 1/2" Square Drive Socket Set includes six sockets sized 6S, 8S, 10S, 12S, 14S, and 16S, all mounted on a 200mm rail for easy organization and accessibility. This set is designed with the innovative LHSTIX® technology, a registered trademark of OSG CORPORATION's System Engineering Department. The LHSTIX screw concept enhances efficiency and balance in fastening applications by transmitting torque along the outer circumference of the screw head. This innovative design ensures optimal performance without incorporating a specific tapered angle between the driving tool and the screw head, making it an invaluable addition to any toolbox for professionals seeking reliable and effective fastening solutions.