The Mono Tough eraser features anew formulation combined with a unique sleeve shape to achieve maximum break resistance. Thenon-flex formulation reduces cuts caused by use over time, while the uniquely shaped front & back alternating diagonal sleeve evenly distribute stress over eraser surface.The cardboard sleeve features an arrow mark for ideal finger position to reduce flexing and is perforated for easy length adjustment with use.

The MONO eraser is a classic that has been around since 1967 -when Tombow launched the MONO 100 line of pencils, a newly developed MONO eraser was included in every pack. The eraser was so popular that it went into mass production and has been sold on its own ever since.