Diablo StickFast 5-In. 180-Grit ROS Sanding Discs, 50-Pack are for removing minor imions and performing initial sanding between paint or stain coats. Crafted from a premium ceramic grain blend, these discs deliver fast material removal and a long sanding life. They are designed with Clog-SHIELD technology, which helps reduce pitch build-up and clogging by using a special blend of grinding agents. The StickFast backing features an industrial-grade Pressure Sensitive Adhesive (PSA) that ensures a strong and secure bond during use, making these sanding discs reliable and efficient for your sanding projects. Model Number: DCD050180P50G