A magnetic device is provided for holding paper memos, documents, notices, notes, photos and similar non-magnetic thin sheet materials against a flat or rounded, usually vertically oriented, magnetically attractive surface such as a refrigerator door. It comprises two neodymium disc magnets attached to a steel plate. The entire assembly is encapsulated in silicone rubber. The steel plate serves as a rigid structural splint. The steel plate also serves to focus the magnetic fields of the two magnets, thereby increasing the device's magnetic strength without increasing the size of the magnets.