The SPI Electronic Micrometer, model 17-849-1, is a precision tool for measuring a range of 1'' to .0001''. It provides accurate readings for metalworking inspection and measurement. With a minimum measurement of .0001 inches and a maximum of 1 inch, this micrometer is ideal for CNC, metalworking, and manufacturing processes. The electronic reading ensures high precision and reliability for a variety of industrial applications. The SPI brand is known for producing quality inspection and measurement tools, making this micrometer a valuable asset for businesses in the manufacturing sector.