Product review (4 stars): Complete dryer drum roller replacement kit
The kit does not include any instructions, but there are several videos on Youtube that show and attempt to explain how to replace the drum rollers.  Used the kit on a stackable Maytag washer and dryer unit.  The original drum rollers on the dryer were starting to seize up after many years of use and WD40 only worked so long to keep the drum rollers from seizing again.  Snap ring pliers are a must since a snap ring secures each roller onto each pin.