Product review (2 stars): READ THE INSTRUCTIONS carefully!!!
I like this product and believe it has a useful purpose and despite the fact that the packaging lists that you keep it turning 'right' even when extracting the brush, my natural instincts kicked in when extracting this from a 'very long' dryer vent pipe and yep, you guessed it, the head unscrewed from the rod and now I cannot extract the brush which is 'stuck' somewhere in the pipe.  I'm afraid this could end up being a very costly repair as this occurred in a condo rental unit I own and I cannot access the vent pipe inside the condo without tearing out drywall.  I subsequently purchased additional rods from my local big box store in an attempt to fish the stuck head out (with various attachments) and noticed their product has an ingenious design that this kit is missing....a hex screw which firmly attaches the brush head to the threads once it has been screwed onto the rod!!  WHY DOESN'T THIS PRODUCT DO THE SAME??  I would return this product but I don't have the brush head available and personally, I'd like to send them the bill for whatever it ends up costing me to get this problem resolved!!  Again, with the right safe guards in place I would have no problem recommending this product, but as is I cannot.  Be sure to look for a kit that includes a screw that will firmly attach the brush head to the threads so that a forward or reverse spin will not leave you in the situation I'm in at the moment!!  BTW...big box = Lowes Home Improvement...their product is more expensive but well worth it not to be left with the headache I'm experiencing!!