Made with a 3/8 inch drive, Craftsman?s 3 inch Wobble Extension, Chrome attaches to your socket wrench to provide improved access to hardware, even at awkward angles. The wobble extension delivers a roughly 20-degree range of motion without sacrificing strength or control, allowing you to loosen and fasten stubborn nuts and bolts. Whether you have to do some work under the sink or on a car?s engine, some hardware just don?t reach far enough when paired with standard extensions. Fortunately, this unique design enables you to work with a straight drive or wobbled access for an indirect approach to the fastener.