The Hitachi 17501 Superdrive Cement-Hardboard to Steel screws are a high-quality fastening solution for various home improvement projects. With a length of 4 inches and a gauge of 8, these collated screws are designed for use in cement-hardboard to steel applications. Made of durable steel and measuring 1 1/4 inches in rail height, these Taiwan-manufactured screws provide reliable performance and long-lasting durability for your building needs.