Diablo's premium 5 in. 150-Grit universal, 12-hole random orbital sanding (ROS) discs with Hook and Lock backing offer a range of breakthrough innovations that greatly enhance performance, extend the lifespan of the sanding discs, and increase overall productivity. These discs are made with a premium ceramic blend that allows for faster material removal compared to other sanding discs, while also providing an exceptionally long sanding life. Diablo's unique Clog-SHIELD, a blend of grinding agents, effectively reduces loading, maximizing productivity. Additionally, the superior Grit-to-backing bond, known as ENDURA-BOND, ensures that Diablo's sanding discs have a longer lifespan and extreme durability. The premium ceramic blend used in these discs is a superior quality formulation specifically designed for fast material removal and extended sanding life. The discs feature a unique 12-hole pattern, making them compatible with all 5 and 8-hole sanders, allowing for fast and precise alignment. The premium hook and lock backing enables repeated attachment and removal of the discs, ensuring a consistent and secure connection. The discs are also coated with Clog-SHIELD, a high-performance coating that reduces pitch build-up and clogging, resulting in maximum productivity. The specialized high strength resin, known as ENDURA-BOND, provides a superior grit-to-backing bond, ensuring extreme durability. These sanding discs are suitable for use with orbital and DA sanders, and can be used on a variety of materials including wood, metal, and plastics. They are recommended for removing minor imperfections and for initial sanding between paint or stain coats. With Diablo's premium 5 in. 150-Grit universal, 12-hole random orbital sanding discs, you can expect exceptional performance, extended lifespan, and increased productivity for all your sanding needs.