The product is a 1 3/4 - 16-N-2 Thread Plug Gage with the brand being Cadillac. This gage is used for thread inspection and measurement, specifically designed for metalworking applications. It is a no-go plug gage, providing precise measurements to ensure threads meet specifications. The P.D. 1.7035 indicates the thread size and type, making it a valuable tool for quality control in manufacturing.