The Starrett No. 436-1 Micrometer is a vintage machinist tool made in the USA. It is a precision outside micrometer with a range of 0 to 1 inches, allowing for precise measurements in metalworking applications. With a mechanical reading, this tool is ideal for CNC machining, metalworking, and manufacturing industries. Known for its quality and reliability, the Starrett brand is highly regarded among professionals in the field.