Product review (5 stars): A year later and all's fine.
Saved a ton of money. Thought the washer was dead and started taking it apart, which was easier than I thought, and figured out these parts were worn. I've had these replacements in for almost a year and no problems. Saved me from buying a new machine. I think they make them out of plastic so they will deliberately strip if you overloaded the washer, which "someone" in my house did repeatedly. This would prevent you from burning out the motor.
Worth every penny.