Gifts for Readers & Writers 3-in-1 Erasable Ballpoint Gel Pen and Bookmark is perfect for keeping your page, writing notes in books and journals (and erasing mistakes.). It works with books of all shapes and sizes from textbooks, paperbacks, hardcover novels to newspapers and magazines. The Pen uses quality erasable gel ink and has a comfortable pen grip. The friction style eraser leaves no "crumbs". This unique accessory has a 4mm ultra thin profile, with a durable clip securely fastening to your page. It is an excellent novelty gift for all ages whether its for birthdays or any special occasion. Comes in Refill colour.