Product review (4 stars): Works well, should last
Worked great cleaning two dryer ducts, both cleanings produced a pile of lint stuck that was in the duct. I believe if I am somewhat gentle with the handling of the cleaner and drill rpm, this should last through many cleanings. If you pay attention to what you are doing by starting with a single section, spin with a drill on low rpm, and continue adding sections as you push it further up the duct, you should get good results and the product should hold up.