The Milton 1/4 In. M-Style Coupler and Plug S-711 is a high-quality air tool fitting suitable for use with air drills and air compressors. Made by the trusted brand Milton, this coupler and plug set is designed for ease of use and durability. With a diameter of 4 inches and a length of 3.75 inches, this product is a reliable choice for connecting air tools in various applications. The set includes one item, making it a convenient addition to any workshop or tool collection.