All Discs Feature Patented, Ceramic Alumina Abrasive And A Unique, Fiber Reinforced Backing. The 3x Ceramic Alumni Grain Is A High Performance Disc That Fits 5- And 8-Hole Sanders And Lasts Three Times Longer Than Conventional Aluminum Oxide Discs, Is Edge Tear Resistant, And Provides A Consistent Finish. The Hook-And-Loop Backing Provides An Easy Change Option.
