When looking at charcoals from afar, one of the last things you think about is how the necessary blending was achieved. Of course, there are many techniques for doing so on both large and small scales, with some being better than others. For those who want a simple replacement for their fingers and don’t have the patience to roll their own, packs of tortillons (rolled paper blending stumps) are available in most art stores or departments.
And really, there isn’t much to say beyond the fact that they do their job, and for a couple bucks you save the time of making them yourself (perhaps incorrectly). They’re one of my least favorite implements for blending and work best when you really don’t want to use your finger, and what you’re working on requires very fine detail (using a rag or a chamois is always preferable if you have the space).
While the paper isn’t of superior quality, it gets the job done, and the wrapping holds together through use and sharpening. If you’re looking for a blending stump there really is nothing else to it, and while someone somewhere likely has the best paper for the job, there’s nothing wrong with these ones.