The HEMCO .5624" Class X Plain Cylindrical Ring Gage is a matching pair of precision inspection gages used for measuring the size and accuracy of cylindrical rings in metalworking applications. Made by the trusted brand HEMCO, these gages provide accurate measurements for ensuring quality control in CNC machining and manufacturing processes. The not-go set design allows for quick and efficient inspections, helping to streamline the inspection and measurement process for businesses in the industrial sector.