Product review (2 stars): dont run in reverse!!!!
I rarely give product reviews but I think this one needs It. The Manual does warn you to not run the drill in reverse but this warning should be all over the package and box and product itself. a better idea would be to redesign it so that it snaps together so drill direction doesn't matter. Needless to say I lost the brush in my dryer vent and had to pay over $100 to get it removed. I would recommend this tool as long as you dilute the directions exactly. Any deviation will cause you problems!