The Vintage Starrett 230 1" inch micrometer is a high-quality outside micrometer with a maximum measurement of 1 inch and a resolution of 0.00010 inches. Made in the United States, this mechanical micrometer is ideal for precise measurements and is perfect for woodworking, metalworking, or any other applications where accurate measurements are crucial. The Starrett brand is known for its reliability and durability, making this micrometer a valuable tool for professionals and hobbyists alike.