H7372 Flap Disc Abrasive Type Coated Abrasive Material Ceramic Grade Medium Backing Plate Material Composite Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating Standard Flap Disc Type Type 29 Overall Diameter 4 1/2 in Quick Change System Not Applicable Series Tiger Ceramic Trim Backing Material Phenolic Backing Weight X Grit 60 Maximum Operating Speed 13 000 RPM Features Performance Coated Trimmable