The Grainger 16Z060 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. The deep design allows access to recessed fasteners. Overall this Westward impact socket set offers a versatile range of durable metric sockets to tackle automotive and machinery fastening jobs.