The Grainger 14G036 is a Westward 3/8-inch drive deep impact socket set. This 12-piece set includes sizes ranging from 10mm to 19mm, providing a wide range of metric sockets for impact wrench use. The sockets are made from chrome vanadium steel for durability and have a black phosphate finish to resist corrosion. According to the product details, these impact sockets are designed for use with pneumatic tools up to 1,000 ft-lbs of torque. The set comes packaged in a molded case for convenient storage and organization. With their durable construction and useful range of sizes, these Westward impact sockets are a solid choice for automotive and industrial applications requiring high torque.