To combine Gizmos and Magnets, a buddy of mine dropped a mini tubing cutter down a 3" steel support pipe. Sending a magnet down on a string was out of the question, so I sleeved a piece of schedual 80 over the outside, and tied seperate strings to the magnet and the conduit. The sleeve kept the magnet from sticking to the steel pipe until the whole shebang reached the bottom, then I could drop the magnet down the inside of the sleeve until I heard it hit the tubing cutter. Pull everything back up easy as you please.
Those neodymium magnets are great!
-John
