The Craftsman CMMT #23145 5/16" Deep Socket is a single item hand tool designed for automotive use. This socket features a 6 point drive type with a 3/8" drive size and a chrome finish. Made by Craftsman in Taiwan, this standard socket is part of the CMMT series and measures in SAE units. Perfect for professionals and automotive enthusiasts, this durable and reliable socket is a valuable addition to any toolbox.