Product review (3 stars): just wished there was a better way to secure it to a drill
It worked somewhat well.  When attached to a drill to try to clean out vent, it came unscrewed from the drill and was stuck in the vent. Yikes, what a mess.  Had to take the entire vent system, up 8 feet and over about 6 feet in order to get it out.  Not the fault of the tool, just wished there was a better way to secure it to a drill.