This is a nice complement to the Extra Aggressive erasers, as they are good for blending and softening edges.
Aggressive eraser:
This is an eraser that looks like a pencil. The eraser is of a coarse nature that removes pencil, ink, and lightly applied paints. It is an aggressive, sharpen-able, wood encased, pencil-type eraser. These (and similar) are among our most heavily used tools outside of the airbrush itself.
Comes in sets of 3 eraser pencils.