Product review (5 stars): Purchase of the year!!!
Washing machine stopped agitating.  Looked up possible causes online and watched a brief video on You Tube on how to swap out these agitator dogs.  Found these parts on Amazon for about $4.00!  Items arrived quickly and my repairs were VERY SIMPLE and completed in less then 10 minutes.  Saved the cost of a repair person or buying new $$$$.  Without a doubt, BEST PURCHASE OF THE YEAR!!!