The Tungsten Cap-O-Matic Space Pen finished in Cerakote is among Fisher's toughest retractable pens. Single-hand activation and quick retraction make this model the trade professional's workhorse. Not everybody has a free hand to use when writing in tough spots, whether upside down, hanging off a ladder, or sliding under a vehicle to take measurements. The creation of the Cap-O-Matic allowed Fisher Space Pen to offer the same technology astronauts used in a single-hand activation but at a price that everyone can afford! Suitable for tactical, military, outdoor, space and automotive trades with all brass construction and Cerakote polymer coating.