Product review (5 stars): I had to buy 2 sets, to get long ...
I had to buy 2 sets, to get long enough rod.. but it WORKED!! as long as you are careful to not bend rod ( and I bent 1, but had 2 extras from 2 complete sets).  you also have to only spin the drill clockwise,,,, going in AND out so you don't unscrew it... it works!!!  I was able to clean out my vent myself w/o $150 prof fee and instead of 3 cycles to dry jeans, its only 1.... the lint trap has even distribution of lint instead of only in 1 corner.  I remove a lot "crap".  Even if I throw both sets away today, it was worth it to me.