The product is a 22-inch butcher's meat saw blade by Lem Products, designed for manual operation with a pin hub size. The model number is 639A. This saw blade is specifically designed for commercial meat processing equipment, such as meat choppers and grinders, commonly used in restaurant and food service establishments. Its sturdy construction and large size make it ideal for cutting through various types of meat efficiently and accurately, catering to the needs of professional chefs and meat processors.