FRETS.COM
Shop Tip #316
© Frank Ford 2006; Photo by FF

I recently bought a new buffer, and it came with a pair of wrenches to mount the buffing wheels.  I figured I'd use them once every couple of years when I changed buffs, and I didn't want to loose them.  So I stuck them on the side of the column with a bunch of those super strong neodymium magnets. No rattling, no problem.