The Vintage Federal Model B21 .0001" Dial Indicator is a high-quality indicator tool made by the Federal brand in the United States. This vintage original dial test indicator has a measurement range of .0001 to .010 inches, making it ideal for precise measurements in metalworking and inspection tasks. With a single unit quantity, this indicator is a valuable tool for CNC machining, metalworking, and manufacturing industries, ensuring accurate and reliable results in measuring thin tolerances.