The Backer-On Cement Board Screws #9 are high-quality fasteners designed for use with cement board materials. These screws come in multiple sizes and quantities, making them versatile for various projects. Made of steel with a sharp point and star drive style, they are durable and easy to install. The brand, Backer-On, is known for its reliability, and these screws are manufactured in Taiwan to ensure quality and performance. Whether you are a professional contractor or a DIY enthusiast, these cement board screws provide the necessary hardware for your next project.