Depressed Center Wheel: Type 27, 5" Dia, 1/8" Thick, Ceramic 36 Grit, Wheel Diameter (Inch): 5 , Wheel Thickness (Inch): 1/8 , Hole Thread Size: 5/8-11 , Wheel Type: Type 27 , Abrasive Material: Ceramic , Grit: 36 , Connector Type: Threaded , Bond Type: Resinoid. Additional marketing and technical details: Off & Grinding Wheel, Abrasive Material Ceramic, Connector Size 5/8 In.-11, Connector Type Threaded Hole, Grit 36, Overall Diameter 5 in, Overall Thickness 0.125 in, Primary Material Application Stainless Steel, Steel, Compatible Tool Type Angle Grinder, Series & Grind, Wheel Type Type 27, Maximum Operating Speed 12,500 RPM, Color Black, Grade Not Applicable. Made in Austria.