The magnet works, it's cheap and it doesn't wear out. The big confusion is which side to use. For almost all instances you want to use "Bio-North" side which is "Magnetic South". "Bio-North is the actual magnetism found at the geographic North pole which is "Magnetic South" The Red (North Pointer) of a compass will point to the "Bio-North" side of the magnet (which is also called Magnetic south. Big, big confusion arose about this due to the way they use the terms.