The Lufkin Tool 1"-6" Micrometer Set is a precision measuring tool designed for machinists and metalworking professionals. Made in the United States, this outside micrometer set features a range of 0 to 6 inches with mechanical readings for accurate measurements. The Lufkin brand is known for its quality and reliability in the field of micrometers, making this set a valuable tool for inspection and measurement tasks in CNC, metalworking, and manufacturing industries.