Product review (4 stars): Easy swap, just remove hubs from new parts with ...
Fit our WDT910SAYM which had fragile skinny plastic tabs to hold the rollers in place, which started breaking.  Upsides are that the new parts appear much stronger (metal) where it counts, and more clearance below the top rack near the sides.  One minor downside is that the adjuster mechanism is a little wider, so the widest cup you can fit alongside the mechanism on the outer rows is going to be a little smaller.

NOTE - for our model, we swapped over the original white plastic rollers, as the rollers that came attached to the parts in this kit didn't fit in the tracks well.  Easy swap, just remove hubs from new parts with a 4mm socket and swap rollers over, reattach hubs.