The Lufkin X46 Red end Extension Rule is a vintage original folding wood rule made in the United States. It features a 6-inch extension and operates on the SAE unit of measurement. This collectible tool is perfect for carpentry and woodworking projects, offering a range of 72 inches with the added extension for precise measurements. The Lufkin brand ensures quality and reliability in measuring tools, making this extension rule a valuable addition to any workshop or collection.