Pilot Frixion Clicker, the retractable erasable gel ink pen The erasable Pilot Frixion Clicker is a unique gel pen, perfect for everyday use at work, home or school. With no damage to the paper, you can erase and instantly re-write over your mistakes. The friction-generated heat caused when rubbing the paper with the special tip turns the ink invisible. Frixion Clicker is available in a range of exciting colours.