Product review (1 stars): Part is easy to break, comes with no instructions.
The small inner piece that holds these roller brackets in place had broken on both sides in the rear on our 2006 KitchenAid. These are, indeed, the correct replacement pars, and they came quickly. Saldly, because they came with no instructions whatsoever, I missed that there needed to be a sort of a twist maneuver to get them inplace over the vertical piece of the shelf, and in the proceed of trying to get them off again to get them into the correct position, I managed to break off those delicate, damned little pieces of plastic on the new rollers. So, now I am ordering again. AGH. These are pretty poorly designed, but the lack of guidance is really unforgivable--though it certainly results in more sales, I suppose. At least I now know how they are meant to be installed.