One of the guys who works here thinks this part description would make for a good band name: agitator dogs! One thing’s for sure, we sell a LOT of them. They have tiny teeth that wear out over time and when they do the top part of the agitator will stop moving like it’s supposed to. These dogs come in a pack of 4 and they were used in many Whirlpool and Sears/Kenmore top load washing machines. The part number for a pack of 4 is 80040.