Diablo StickFast 5-In. 40-Grit ROS Sanding Discs, 50-Pack are designed for heavy-duty sanding tasks such as leveling surfaces and removing extra heavy stock or paint. Crafted from a premium ceramic grain blend, these discs deliver fast material removal and a long sanding life. They incorporate Clog-SHIELD technology, which reduces 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 to your sanding tool, providing reliable performance throughout your project. Model Number: DCD050040P50G