Standard Pack = 1 piece(s). Color and Bond = Gray Vitrified ; Diameter = 12 IN ; Grit Size = 46 IN ; Hardness = H ; Hole Size = 5 IN ; Material = Aluminum Oxide ; Recess = 7 1/2 IN x 1/2 IN ; RPM = 2228 ; Size = 12 IN x 2 IN x 5 IN ; Standard Package = 1 ; Thickness = 2 IN ; Wheel Type = Type 7 ;