Product review (5 stars): Worked exactly as advertised
I used this kit along with the 12 foot extension kit to clean out a 4 inch wide x 22 foot long dryer vent and it worked like a champ. I used a power drill and ran the brush slowly through the entire length of the pipe until it came out the other end. I then took a leaf blower and put it in the pipe where I started. I turned the blower on and a HUGE glob of lint and a ton of dust shot out the far end of the pipe. It was honestly quite satisfying to see (yeah, my life if boring). I would definitely recommend this product, especially for use on long runs of dryer ducts.