Depressed Center Grinding Wheel, Abrasive Material Silicon Carbide, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 24, Overall Diameter 7 in, Overall Thickness 0.25 in, Primary Material Application Cast Iron, Concrete, Masonry, Compatible Tool Type Angle Grinder, Series High-Performance, Wheel Type Type 27, Maximum Operating Speed 8,700 RPM, Grade Extra Coarse