If you're tired of taking the time to thread a knob onto a long piece of threaded rod, grab your portable electric drill and chuck a drum sander (without the sanding sleeve) into its jaws.

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If you're tired of taking the time to thread a knob onto a long piece of threaded rod, grab your portable electric drill and chuck a drum sander (without the sanding sleeve) into its jaws. Then, turn on the drill with the chuck spinning in reverse (counterclockwise) and gently touch the rubber drum to the knob. The knob will race along the threaded rod much faster than you could spin it by hand.
—Tim Gant, Blooming Glen, Pa.