J1568 Flap Disc Abrasive Type Coated Abrasive Material Ceramic Grade Coarse Backing Plate Material Phenolic Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating High Flap Disc Type Type 27 Overall Diameter 4 1/2 in Quick Change System Not Applicable Series Tiger Ceramic HD Backing Material Phenolic Grit 40 Maximum Operating Speed 12 000 RPM Color Red Features Performance Coated