Product review (5 stars): Best replacement for your upper rack adjuster.
Much better than the original plastic adjuster. MAKE SURE you buy the updated version because it won't break like the plastic ones. I used this video; [...](or paste this into youtube search "Whirlpool, Kenmore, KitchenAid - Dishwasher Replacement Rack Adjuster Kit # W10712394"
I managed to install the kit in about 15 minutes.