The Craftsman 4368 British Standard Whitworth Open End Wrench Set includes three pieces, with one missing. This set features a specialty system of measurement and is made in the United States. With a manufacturer part number of 4368, this set is ideal for automotive and hand tool enthusiasts looking to add a unique and high-quality wrench set to their collection. The Craftsman brand is known for its durability and reliability, making this set a valuable addition to any workshop or garage.