Pen is a writing device used drawing as well as writing. They have a nib made of metal which may be fitted into a refill made of either plastic or metal. It is thin like a stick which has a handle and refill where ink can be filled. A nib is attached to the body of the pen which has its other side connected with the ink. While writing the ink passes through the nib enabling it to write. Inks are now available in different colours and are even available in gel forms. Pens are available in different forms like fountain pen, ball point pen and gel pen.