In the 6th century B.C., Thales of Miletus, a Greek wise man, reasoned that a magnet’s power of attraction was the result of science, not magic.

After that, it was only a matter of time (okay, a few millennia) before magnets turned up in TVs, turbines, computer hard drives, and on the fronts of fridges everywhere. Their stick-to-itiveness—in the form of iron horseshoes, shiny rare-earth bars, or vinyl-coated magnetic sheets—is also helpful for a host of household projects.

Magnets Can Be Used To:

  • Locate metal studs in a wall.
  • Seal off air-conditioning vents to improve home heating by placing vinyl-coated sheets over the steel register faces.
  • Hang Polaroids of projects-in-process on the lip of a metal shelf above the workbench.
  • Collect nails from a porch repair job that have fallen in the grass.
  • Prevent corrosion inside your water heater; a magnet placed on the freshwater intake pipe catches damaging metallic calcium particles before they can get inside.
  • Pin blueprints onto the side or hood of the truck.
  • Create a bulletin board without the use of tacks, tape, or hooks on walls coated with “magnetized” paint containing metals.
  • Protect a tractor’s engine: Ceramic magnets placed in the oil pan will attract steel bits that get into the oil from grinding pistons.
  • Fasten steel framing squares to the outside of toolboxes for quick access by gluing magnets to the box sides.
  • Clean up metal shavings that have fallen from the bench grinder onto the workshop floor.