The Starrett Inside Micrometer Set 2-12" Range is a vintage 13 piece set designed for precise measurement of internal dimensions. With a resolution of 0.00100 inches, this mechanical micrometer set is made in the United States by the reputable brand Starrett. The set includes a range of 2 to 12 inches, making it versatile for various metalworking projects in CNC, metalworking, and manufacturing industries. The Model No. 124 features a reliable construction and accurate readings for essential inspection and measurement tasks.