Product review (5 stars): The exact fix for an agitator that won't work
This is a  "sacrificial part" and is designed to wear out over many years so that your washer's transmission doesn't take a beating.  As such, it is designed to be replaced easily and a competent home owner can replace it in mere minutes.  If your GE or Hotpoint washer has stopped agitating but does all other functions then consider replacing this part first!  Replacing this part saved my family hundreds on repair bills or a new washer.

Our last agitator coupling kit lasted 8 years, we expect to get the same life out of this one.