Product review (5 stars): Effective and Easy to Use
When I removed the louvre on the side of the house there was a great deal of lint that I could pull out by hand.  I then inserted the brush connected to a single rod, and used a drill to turn it slowly.  I added rods and turned, loosening the remaining lint in the 4" ducting very effectively.  My only gripe is that I needed more rods than the six that were provided, so I bought an entire second set (including a brush that I did not need).  I would have purchased a set containing the six rods without the brush, but it was more expensive than the full set.  Several times I have seen this "unbalanced pricing" on the Amazon site, and wish that they would fix those situations.