The Brown & Sharpe Tesa 35-40 30-35 17-20 Intrimik Inside Bore Gage Micrometer Set is a high-quality micrometer set designed for precision measurements in metalworking and manufacturing. Made in the United States, this bore micrometer set features mechanical readings and is ideal for CNC machining and other industrial applications. With a focus on accuracy and reliability, this product from Brown & Sharpe is a valuable tool for professionals in the field of inspection and measurement.