This 9-piece 1/4"" deep socket set is drop-forged and chrome-plated for durability. It includes sockets in sizes 5.5, 6, 7, 8, 9, 10, 11, and 12mm, along with a convenient socket holder. Ideal for garage and automotive use, these professional-quality sockets are designed for a long life and come mounted on a storage rail with screw holes for easy mounting.