![Messograf Caliper Pen](https://www.geekalerts.com/u/messograf-caliper-pen-326x245.jpg)
Messograf Caliper Pen
Why just use a pen for writing, when it it be a multi-function tool? This Messograf Caliper Pen servers several purposes. First, it s a retractable ballpoint pen, and a damn cool looking one at that. Second, it is a Vernier caliper that can be […]