Diablo Premium 5-inch 180-grit Random Orbital Sanding (ROS) discs with StickFast backing feature groundbreaking innovations that enhance performance, extend sanding life, and boost productivity. With a premium ceramic blend, these discs remove material faster than other sanding discs and deliver extra-long sanding life. Diablo's proprietary blend of grinding agents, Clog-SHIELD, reduces clogging, maximizing productivity. Warning: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm.