J7233 Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Fine Backing Plate Material Plastic Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating Standard Flap Disc Type Type 27 Overall Diameter 4 1/2 in Series XB1186 Backing Material Plastic Backing Weight X Grit 120 Maximum Operating Speed 13 300 RPM Features Trimmable