Snap-on Tools USA 3/8" - 1/2" Drive Chrome Adapter Extension Socket A2A is a single item manufactured in the United States. It is a specialty socket adapter that allows a 3/8in. drive to adapt to a 1/2in. drive. The extension drive adapter features a friction ball for a secure connection. It is made of chrome with a standard surface finish. This tool set includes an extension and adapter, ideal for automotive and hand tool applications.