Product review (5 stars): A tool you don't think to get until there is an issue.
If you haven't picked one of these up and you have a fridge you want to keep for many years, you need to get one.  I have a large Architect series fridge that came with my house 10 years ago and I had it break down.  When the repair man showed my how BAD my coils were and how to properly maintain them I ordered this brush and I clean the coils monthly.  This particular piece is good for my fridge which has coils on top of the fridge and are packed very tightly.  This one can squeeze into the tight coils without damaging anything and seems like it isn't going to fall apart.  My fridge runs less often and sounds so much better when turning on and off.  I should have gotten this sooner.