Product review (4 stars): One Can Hope Original Factory OEM dogs last longer...
These replacement dogs popped in easily, seem to work fine. But its a little challenging to know WHICH  WAY they should be installed. They are asymetric and, installed backwards, they don't do the job of ratcheting the upper blades of the agitator. No instructions are provided; maybe this information can be found on a washing machine manufacturer's web site. That they EXIST isn't mentioned in what passes for the owner's manual.