The product is a lot of 2 boxes of Hilti X-U 16 P8 fasteners, each containing 100 pieces. These fasteners have a diameter of 5/8 inches or 16mm and are manufactured in Liechtenstein. Designed by Hilti, a reputable brand in the industry, these fasteners are ideal for use in powder-actuated tools for various industrial and construction applications. With high-quality materials and precise engineering, these fasteners are sure to meet the needs of professionals in the field.