H7347 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 27 Overall Diameter 7 in Quick Change System Not Applicable Series Tiger Paw Backing Material Phenolic Grit 36 Maximum Operating Speed 8 600 RPM