Vintage Proto Socket Metal Trail Holder Box Red Handle 6 1/2 x 1 1/2 inches. This collectible tool is made by Proto and was manufactured in the United States. The red handle trail holder box is perfect for storing and organizing your sockets. Measuring 6 1/2 x 1 1/2 inches, this vintage tool is a must-have for any mechanic or collector. The Proto brand is known for its quality and durability, making this trail holder box a reliable addition to your tool collection. Don't miss out on the opportunity to own this piece of American-made history.