The Telescoping Space Pen features solid aluminum construction and a unique retraction mechanism. It has a mini Golf Ball attached to the top reminding us of Alan Shepard"s famous swing. Golf is the first "sport" to reach the moon! Pulling on the Golf Ball end of the pen exposes the ballpoint tip and creates a full length writing instrument. It has no cap, you simply pull the tip to extend the refill and push it in to retract the refill. Always ready to write, even with one hand. Equally easy to use one hand to retract and put in your pocket.