This Kobalt 3/8-in to 3/8-in Standard Socket Joint is a versatile addition to your tool set. The socket joint can be used with both SAE and Metric sockets, and has a chrome finish for durability. The 3/8in drive size is perfect for most automotive and mechanical applications. This single item comes with a lifetime warranty from the manufacturer, and is part of a larger set of Kobalt hand tools. Ideal for both DIY projects and professional work, this socket joint is a must-have for any tool collection.