3M Cubitron™ II 969F flap discs feature a durable polyester backing and a coating with precisely shaped Cubitron™ II ceramic grain for maximum grinding performance and long service life. They contain a Grinding-Aid™ bonding layer that helps maintain high grinding performance when grinding materials sensitive to high temperatures. The discs are intended for demanding applications such as aggressive grinding, edge chamfering, beveling, and grinding under high pressure.