Product review (5 stars): Quick, easy fix for Whirlpool upper agitator.
I found these parts on Amazon after a brief internet search regarding my Whirlpool washing machine's broken agitator.  I was surprised to find out that my machine had a common problem. I was more surprised to learn I could fix it for less than $10.  After watching an instructional video on YouTube, I purchased these parts and fixed my washer in 15 minutes.  Now it works just like new.