Product review (5 stars): Works great for pellet vent
Works great for cleaning my pellet furnace exhaust.  I needed to be able to have a brush that would turn 90's in my vent pipe.  The cheap one I had would get hung up and not get past them.  After reading that this might work I purchased it to try.  Not only does it turn the 90's great it also cleans the pipe much better with the high speed drill.  It really makes a mess! Lol!