I cannot resist showing you this new “tool of the trade”. It combines a black ballpoint pen, a non-drying orange highlighter, a 0.7 lead pencil, a stylus for PDA (Personal Digital Assistant), a ruler with inches and centimeters and uses standard refills. Not enough to become a good bike designer, but it can help a little bit. Only $59.99 if you think you really need to carry one with you   Stanley Multi-Functional Pen.