The Grainger 14A816 is a Westward brand 1/4-inch drive socket set. It contains 41 pieces including 17 metric sockets ranging from 4mm to 14mm, 17 SAE sockets ranging from 1/8 inch to 3/4 inch, 5 hex keys, and 2 ratchets. The sockets and ratchets are made from chrome vanadium steel for durability. This socket set comes organized in a molded case for convenient storage and portability. With both metric and SAE sizes, as well as the included hex keys and ratchets, this socket set is a versatile option for automotive and machinery repair and maintenance.