Product review (4 stars): Kit seems much superior to the plastic ones I have used before.
I bought this kit in May, 2016, as a backup for the earlier plastic version this metal part replaces. I had just finished replacing a broken plastic version a week or so before and I used the standard plastic replacement. The part was breaking so frequently that I always have kept a replacement in reserve. So after I used the part I had on hand, I bought two plastic replacements, one for each side of the rack, and this new metal kit replacement.

So far I have replaced five, including the metal replacement I installed today. Note that the plastic part I replaced had lasted 5 months on our top-of-the-line Kenmore dishwasher. And I want to repeat that we have replaced it 5 times. Five times!! Twice I had a repairman come do the work, then I got smart and started keeping a spare around the house and doing it myself. This has saved me several hundred dollars.

This kit seems much superior to the plastic ones I have used before. It actually goes on easier than the plastic ones, but will take longer the first time because of the dreadful instruction sheet. Poorly written with photos that look like blobs on the page. I was able to figure it out because I am getting to be an expert on installing this "adjuster" part (5 times!!).  I recommend the YouTube video mentioned in another review even though I didn't use it. I took off one star for the crappy instructions that Whirlpool should be ashamed of.

This kit includes ALL the parts to completely replace the two units on both sides of the rack, so you can just break off the old adjuster and toss it. It installs slightly differently from the original plastic part and has fewer little pieces to snap in. Looks like better design over all. This particular time the problem with the old one was that the thumb tab on one side jammed and no amount of "persuasion" would loosen it up. The replacement piece has a different kind of thumb tab that looks like it was designed by an engineer on acid ... but it works smoothly, even though I cannot figure out how it does it. Previous adjuster failures have been because the wheel axle broke off. Hope this one keeps its wheels!

If it doesn't last I have that other plastic replacement! I've learned my lesson (5 times!!).