The Proto J72117 3/8 in. Drive Thin Wall Deep Impact Sockets set provides the right tools for tackling a variety of jobs and projects. These impact sockets are designed to work with various fasteners, including those that are damaged or corroded. The socket set comes in a convenient storage case, which keeps all your tools neat and tidy. It has 9 pieces in total, consisting of 6 pt deep sockets ranging from 1/4 in to 3/4 in. The black oxide finish helps protect against corrosion and gives these impact sockets an appealing look. Each socket is designed with a one through hole and a groove for improved performance when dealing with broken fasteners or nuts that need to be removed by hand. When you need to get your job done quickly and efficiently, trust the Proto J72117 3/8 in Drive Thin Wall Deep Impact Sockets set.