thanks for the replys. I'm looking for a pen for a cousin who is a nurse. The bolt action might work. Nurses usually have a chart in one hand and the pen in the other, so a pen that extends and retracts with one hand is, well, handy. More and more they are using touch screens and a stylus so avoiding touching the screen with the fingers would be helpful. I don't particularly like the style where the point protrudes thru the stylus.