Product review (3 stars): REPLACEMENT PARTS FOR AN ITEM DESIGNED TO FAIL
Since this was the third set of tracks for my Kitchenaid Dishwasher all I can say is it's okay, I know I will have to replace again.  The plastic tabs keep breaking, granted my teenage children don't like alternating dish duty but for a $750 dishwasher I find I am always repairing it especially this part.  I recently had to replace a dishwasher for a relative, and I found the $400 machine had metal hubs for the wheels.  This is such a design flaw, thank god I don't have make a $99 service call to have these replaced or the other items in my DW.  These carriages are easy to switch out, just take your time.