The NBM New Britain Machine Co. USA Rare Specialty Mini Torque Wrenches AF20 & AF21 are a set of two unique tools designed for automotive use. Made in the United States, these specialty torque wrenches feature a SAE system of measurement and come in sizes of 9/16" and 5/16". With an open end and 8 point drive type, these mini torque wrenches are perfect for precision work and have a single item design. Although they come with no warranty, these high-quality tools are a valuable addition to any auto mechanic's toolkit.