This instructable requires:
Small files or sandpaper
serious glue - either strong super glue or two part epoxy
Clear silicone sealant
The magnet. I am using a 1/2" diameter, 1/8" thick neodymium magnet.
They are had to find locally, and thus we do that thing called online shopping. There are a good number of online stores that sell these magnets, but I like Ebay
because it gives you multiple prices and options to compare before buying. I did a little digging on Ebay and as of this posting date, these are a couple of the Ebay stores with better deals for the magnets. Wherever you go to get the magnets, be sure to get the type that want to stack top to bottom, not the type that wants to go edge to edge.
A thin shiny metal tube. I went to the hardware store and found a 12" x 3/8" OD toilet supply tube of polished chrome. Anything around 3/8" in diameter should work - check your local hardware store plumbing isle. Larger sizes are possible, but they would require more powerful magnets.
A plastic cable clamp of the size of the tube. In this case, 3/8"
a small scrap of sandpaper
A bit of cork
white school glue