Standard Pack = 1 piece(s). Diameter = 4 1/2 IN ; Grit = A24N ; Hole Size = 5/8-11 IN ; Material = Aluminum Oxide ; RPM = 13300 ; Size = 4 1/2 x 1/4 x 5/8-11 IN ; Thickness = 1/4 IN ; Type = Depressed Center Wheel ;