So, I found a mysterious tool at my mom’s house, and none of the people who frequent the house know what it is or where it came from. It’s about the shape and size of a largish pen. One end of it has a spring-loaded metal tip with a rounded end, while the other has a tapered flat plastic spatula-like blade. One can twist the plastic portion in and out, which compresses the spring on the metal tip (there are numbers on the shaft to indicate how far in it’s compressed). There’s a metal band in between the two main segments, which bears the words “Chartpak” and “Made in the USA”: Chartpak appears to be an art supply company, but I can find no reference to styli on their website.
Anyone have any idea what this is?