Blueink in 0.5mm, pen refills can easily replace, place it on your fridge with the magnet feature, in order for it to be handy whenever you're in need of a pen. Creative shape style design for ballpoint, suitable for the office, family, school use. Perfect for journals, notebooks, registration books, a diary, making coworkers envious. Best gift for your children, your student, can encourage their interest in studying also enhance one's manipulative ability.