Magnetic tool
David made this handy magnetic tool for fishing rivets out of hard to reach corners of his aeroplane.
First he attached a 1cm diameter spherical neodymium magnet to the end of a piece of fencing wire. David then enclosed the magnet in a small amount of Plastimake. He can now poke his new magnet tool into hard to reach areas of his aeroplane to easily collect any stray rivets.