The General 5pc 3/8 Dr Extension Bar Set, GN23005, includes a selection of extension bars in sizes 3 inches, 6 inches, 10 inches, and 18 inches. These SAE units feature a chrome surface finish and specialty drive type, making them suitable for automotive use. The set is manufactured by Generac and includes all the necessary extension bars for various mechanical tasks. Perfect for mechanics and automotive enthusiasts, this set offers convenience and versatility in one compact package.