Product review (5 stars): Fantastic
I was a little skeptical that the rods would be flexible enough to be able to bend for a 90 degree angle but I was surprised that they were as flexible as described. I have a 90 degree and 45 degree angle in my duct and this tool cleaned it with no problem. I used my cordless drill, taped the joints on the rods as directed and had absolutely no problems at all. I highly recommend this everyone.