Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Extra Coarse Backing Plate Material Phenolic Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating Standard Flap Disc Type Type 29 Overall Diameter 7 in Series Tiger Paw Backing Material Phenolic Backing Weight X Grit 36 Maximum Operating Speed 8 600 RPM