Product review (5 stars): Awesome duct cleaning kit
I bought this and the extension kit to clean 24 feet of dryer duct.  This item is awesome.  I was able to pull out 20 years of lint (and a sock). It took me about 30 min to clean.  Prior to purchasing this kit, I tried cleaning using a leaf blower, that didn't work.  I had so much stuff attached to the walls of my duct.  The rods are pretty flexible and strong.  You would have to be a dummy to break this kit.