Product review (3 stars): Exact OEM part - but lack durability
As far as OEM replacement parts go, this is a perfect replacement, since it's made by Whirlpool (or its OEM supplier).  The thing I hate about this part is that it is not durable.  This is the third set of adjusters I've replaced in 4 yrs because one or more of the plastic wheels breaks off.  The wheel is actually fine.  the problem is the poorly engineered hub that the wheel is inserted into.  These wheels can get abused, because it's constantly being impacted on by the rail end.  Also if the rack is loaded with heavy glasses, the weight can damage the hub causing the wheel to fall off.  All I can say is:  poorly engineered part designed to make you come back over and over again for more.