
What you pictured is a bearing driver set. They have a seal driver set with about 15-20 black nylon discs. Some of those are cupped. I'd give you the part number, but I threw away the box years ago.
I just used mine the other day to do the hub seals on my k1500. The plastic has never really concerned me (although I agree aluminum would be better). It comes with a big metal washer that you should use to back up the bigger ones. The cupped ones are thicker and heavierby the way.Thanks for pointing that out. Just checked out that set. Wish it was made of aluminum tho. The black nylon set seems to have bad reviews but I think people are using it for the wrong purpose
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