Flap Disc Abrasive Type Coated Abrasive Material Zirconia Alumina Grade Coarse Connector Size 1/4 in-20 Connector Type Threaded Hole Flap Disc Type Type 27 Overall Diameter 2 in Quick Change System TS Series Mini-POLIFAN Backing Material Plastic Backing Weight Y Grit 40 Maximum Operating Speed 14 000 RPM