Papermate Inkjoy 100RT Retractable Ballpoint Pen 1.0mm, Classic Assorted Colours - 10 Pack. These Paper Mate Inkjoy Ballpoint Pens are ideal for daily writing activities. They have a retractable design so you can protect the tip, and also be ready for use at anytime. They have a fast-starting writing system to ensure that the ink flows smoothly across your page. These pens each feature a 1 mm nib. They are ideal for use on paper. The ink is smooth-flowing and vivid. This 10 pack contains pens that write in blue, black, and red ink.