This vintage Lufkin Rule Co 5" steel toolmakers round spring outside caliper is a must-have for any collector or machining enthusiast. Made in the United States, this high-quality tool is perfect for measuring and shaping metal objects with precision.

With its durable construction and reliable performance, this caliper is sure to make a valuable addition to your tool collection. Whether you're a professional machinist or a DIY enthusiast, this tool is perfect for all your machining needs. Don't miss out on this opportunity to own a piece of American-made history.