The Snap-on Tools USA 1/4” Drive Double D Carburetor Adjusting Socket S6139 is a high-quality, specialty socket designed for adjusting carburetors. Made in the United States with a chrome surface finish, this single item socket features a unique double D design for precise adjustments. With a 1/4 inch drive size, this tool is perfect for automotive professionals and enthusiasts looking for reliable and durable hand tools.