Product review (1 stars): FLAWED DESIGN.  BUILT TO BREAK
If you need this part to fix your dishwasher rack, by all means, get this one.  It is reasonably priced an a factory quality replacement.  If you plan in keeping your dishwasher, buy an extra pair.

The problem is in the design of the adjuster.  The plastic tabs that hold the wheels on are not strong enough.  They break off of the adjuster  on one side and that usually causes the tabs on the other adjuster to break off.  I have two dishwashers in my home and in the first year I replaced 3 sets of these adjusters.  And just replaced another set. We have 10 in our household, hence the 2 dishwashers, but with 2 units, it's not getting much more than average use.  It is just a flawed design.  It appears to be built to break!