The erasable Frixion Point is a unique needle point pen that contains thermo sensitive gel ink. Precision-engineered with a tungsten carbide “needle point” 0.4mm ball, delivering an extra fine 0.25mm line. Perfect for those who like ultra precise writing. The heat generated by friction when rubbing the paper with the special tip turns the ink invisible. With no damage to the paper, you can erase and instantly re-write over your mistakes. Ideal for everyday use at home, work or school. NOTE: Do not use Frixion on legal documents, cheques or when writing exams. 0.4mm ultra fine tip.