I have one of those. There's also a 1x30" leather belt available for them that can be used for stropping. I got the leather belt on ebay. Just release the tension each time you're done using it so it doesn't stretch.
I've since gotten a Sorby Pro Edge which is more money, but much more accurate and versatile, and so... more useful. There are a lot of attachments available for maintaining precise repeatable angles on a large variety of tools, including turning and carving tools.