This box contains 25 black construction lag and timber screws, measuring 5/16 x 8 inches each. These screws are ideal for use in a variety of industrial and commercial applications, where they provide a reliable and sturdy fastening solution. The brand of the screws is Midwest Fastener, and they are sold in a system of measurement that is commonly used in the industry. In addition to their practical use, these screws also have a sleek and professional appearance, making them a great choice for any business or industrial setting. Whether you are working with wood or other materials, these screws are sure to provide the strength and stability you need to complete your project.