Product review (4 stars): Whirlpool Design Flaw Correction
This is my third set for a Whirlpool high-end dishwasher that was manufactured with a rack adjuster design flaw.  The o.e.m. wheel attachments were plastic and over relatively short periods of time would break off making the top rack unusable.  Glad to see that after years, Whirlpool has finally modified/improved the design of the replacement parts.  Hopefully these modifications will withstand the test of time.