Product review (5 stars): Saved the day!!
Lets face it, this thing doesn't do much, but what it does, it does well!  Came home July 3rd night to find that our washer wasn't agitating, which in turn, agitiated me!  We have an old GE WHRE5260E1CC and the old coupler was worn down.  Using google and youtube, I was able to figure out how to remove the agitator and replace this coupler.  All told, about a 5 minute job.  Super quick Prime shipping by Amazon saved us from being buried by a mountain of laundry on July 4th!