The Ko-ken RS3450MH/6 3/8" Square Drive Nut Grip Socket Set is a 6-piece collection designed for innovative fastening solutions. This set includes Nut Grip sockets in sizes 8mm, 10mm, 12mm, 13mm, 14mm, and 17mm, all securely mounted on a 150mm rail for easy organization and access. Unique to Ko-ken, the Nut Grip design holds nuts and bolts firmly in place without the use of magnets, utilizing a system of coil springs and ball bearings on opposing flats. When a nut or bolt is inserted, the ball bearings push out against the springs, ensuring a secure grip. Crafted for durability and performance, this Nut Grip socket set is an essential tool for efficient and reliable fastening tasks.