Product review (5 stars): Cleaning dryer duct  made easy
This tool makes it so easy. I had to purchase two kits because my vent is 15 feet long. Put the end it in my drill and using the tool from outside the house. 10 minutes to clean the vent.  I turned the drier on "air dry" instead of running a shop-vac, out came all the lint. It worked excellently. I wish I'd bought it a long time ago!