Product review (4 stars): Easy to install, my clothes are now very agitated!
Not much to say about this repair kit other than to say that my Whirlpool washing machine now agitates and cleans clothes as it should.  There are plenty of videos online for installation, and it really is a simple ten minute job with basic hand tools.  Just search YouTube (or similar) for "whirlpool agitator dog replacement" and you'll be all set.