Kneadable / Putty Eraser
Finally at Choosing Keeping we have a kneaded eraser. Also known as putty erasers, these are malleable and can be shaped into any shape for precision erasing. Usually they are part of the artists basic materials, and particularly suited for use with very messy charcoals, soft graphite and even pastels. Use this for lifting, aka removing marks to bring out highlights and volume.
The one here offered, is from a very small and charming supplier, and comes with the appropriate odd and exotic packaging. Beware it looks a bit like a chewing gum or blue tack but it is neither of these things.