Product review (5 stars): I am glad I read all the reviews that said not to ...
Does what it says. I am glad I read all the reviews that said not to force or push it through turns. I have a 11 feet vent and there is a 90 degree bend towards the end of the vent. The brush would not go through. Kept at it slowly and persistently for 20 minutes and it was stuck right there. Was tempted to push through but did not. Took a break and tried again. Spent another 15 minutes truing to slowly push it through but it would not go. Was almost about to give up and try from the other direction when it just went through the bend. I think it was stuck so long was because it collected all the direct from the vent and it all just collected at the bend. Once the majority of the dirt was removed It would go easily through that bend. I used tape on all the connections as per the instructions. It worked great. Make sure you run the drill on high otherwise it will miss some dirt.