Product review (5 stars): Used this with a 12 foot extension because I needed a 20 foot run. No binding and worked great
Decided it was time to clean out the lint before I burn my house down. This device looked fairly straightforward and I had concerns because I needed at least a 20 foot run of the rods. I was concerned that with three right angles it would bind up a break.

I use this and bought the 12 foot extension

This device does come with 12 feet.

Applied to the drill and spun it down the vent and got lint out and perfect result.

So, five stars for the extension.

Five stars for this device. It went around corners, did not bind, and got all the lint out of the vent that was over 20 feet long.

No more fires in my future.