Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Backing Plate Material Eco-Trim Connector Size 5/8 In.-11 Connector Type Threaded Hole Density Rating Standard Flap Disc Type Type 27 Overall Diameter 6 in Series ENDURO-FLEX Grit 40 Maximum Operating Speed 10 200 RPM Features Trimmable