Product review (5 stars): A great package to restore your old washer to like new!
Originally needing only the coupler, the dogs were a throw in made this package a great value.  The coupler installed easily if you're the slightest bit handy with tools.  The plastic is metal reinforced in the center making this a great product.  The agitator dogs are very easy to replace and gave me instant, noticeable improvement in agitation.  If your washer is several years old, replace the agitator dogs.  They are plastic teeth so I definitely saw wear in the ones I replaced.  These 2 items immensely improved the performance of my 14 year old Kenmore washer.