Retractable version the best selling frixion ball integrated eraser. Never cross out again with frixion, the erasable pen from pilot! Pilot's best-selling rollerball allows you to cleanly write, delete (frixion it) and rewrite - all with the same pen. Simply rub out your mistakes with the eraser stud and watch the ink disappear as if by magic! The unique gel ink responds to the heat generated by the rubbing out, and lets you write over your mistake immediately with the same pen.