The LAMY cp1 tri pen is three writing instruments in one.
It has both a blue and red ballpoint pen refill plus it has a 0.5 mechanical pencil. Chose which instrument you want to use with the pen’s twist-action mechanism located just below the pen clip. The clip is spring-action, making it easy to attach the pen to your journal or a pocket. To complete the LAMY cp 1 tri pen there is an eraser located under the removable push-button at the top of the pen.
This pen eliminates desk clutter and makes it convenient for taking multiple needed writing instruments in a case, purse or back pack.