Depressed Center Grinding Wheel, Abrasive Material Aluminum Oxide, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 24, Overall Diameter 5 in, Overall Thickness 0.25 in, Primary Material Applicationn Cast Iron, Stainless Steel, Compatible Tool Type Angle Grinder, Series Gemini, Wheel Type Type 27, Maximum Operating Speed 12,225 RPM, Grade Extra Coarse