Product review (5 stars): Cleaner clothes and a simple solution.
My washer stopped agitating.  Googled the problem and found a video from a guy saying the "dogs" were bad.  What I said?!  Ordered these and sure enough, Under $4 and a screwdriver I fixed my washing machine!! I saved over $100 from  a service call. Amazing. So happy I accomplished a "DIY" project.