This is your chain roller kit. Also we have a good grade of bolt and locking nut for the outside dog 8.8 metric.

The parts are all after market not a Stihl brand but they are a good working and they do the job well.

The nut on the roller might not stay tight so I always use locktite on the threads so it stays there.

In the photo's there is a small clip don't loose it they can really fly when putting them on we also take photo's of each package to be sure it's there don't ask for one I will not be able to help you with this.