The design and construction of this pen has not changed in 36 years. The pen you buy today is exactly the same as the one taken to the moon in 1969. It is a heavy pen, and the weight rests reassuringly in your hand as you write. The AG7 is made from solid brass with an extremely hard chrome plating. It has a very positive and substantial feeling click mechanism. You press down on the top to extend the refill, and press the side button to retract the refill. It's special design assures you that you'll always retract the point before you slide it in your pocket.