New SK 4518 Hand Tool 8 Piece Chrome Universal Adapter Set 1/4″ 3/8″ 1/2 Drive Sizes USA Made! New in original Packaging with Rail! 1/4″, 3/8″, 1/2 Swivel / Universal Joint Adapters. 1/4″ to 3/8″ Adapter. 3/8″ to 1/4″ Adapter. 3/8″ to 1/2″ Adapter. 1/2″ to 3/8″ Adapter. 1/2″ to 3/4″ Adapter. Message us for more details and / or custom quotes.