Depressed Center Grinding Wheel Abrasive Material Aluminum Oxide Connector Size 5/8 In.-11 Connector Type Threaded Hole Grit 24 Overall Diameter 7 in Overall Thickness 0.25 in Primary Material Applicationn Masonry Compatible Tool Type Angle Grinder Series Gemini Wheel Type Type 27 Maximum Operating Speed 8 600 RPM Grade Extra Coarse