The Snap-on Tools SX-3 is a high-quality 3-1/2" long, 1/2" drive chrome extension made in the USA. This standard socket type extension is a single item, featuring a square drive size of 1/2 inch. With a specialty system of measurement and a durable chrome finish, this extension is designed by the reputable brand Snap-on, ensuring top-notch quality and performance for automotive hand tools. Ideal for professionals and automotive enthusiasts alike, this extension adds versatility and efficiency to any socket set.