MONO sand eraser

Tombow's MONO sand eraser is a gritty, abrasive eraser that works better than rubber or vinyl to remove ink, colored pencil, pastel, and other hard-to-erase media from a variety of surfaces. Like sandpaper, it wears away the top layer of the drawing surface, so it's not a good idea to use this eraser with delicate paper. But it can be a lifesaver when a stray droplet of ink threatens to ruin your project. Made by Tombow in Japan.