Hi! I'm promoting the modrod here on this board. Some may not be aware of this. Also, this is in my own words, so I may not quite get it right. So here goes!!!
http://www.modrod.bizThe ModRod is a retractable spin pen made of Lexan (Polycarbonate or the ones used in bulletproof glass).
It is quite very simple in design, with 205.5mm length, 9.53mm in diameter, and 17.75grams in weight, but with the aesthetic appeal, the sky is the limit (not really

). The pros of it is that of course, number 1, is the body itself. Made of polycarbonate, it is quite durable. Also, it is a retractable pen that writes at the "tip" side, so when one uses it in school, one will not quite get "suspicious" of the pen you are using to write (if you use it, that is

) Another is, of course, the one that makes it differ from almost all pen modifications out there. it is the pen itself. You can design with grips, like Dr. Grips, G2 Grips, or almost anything you can put into your modrod. It gives one's modrod a unique "personality". it's kinda like, It defines who you are inside.
The Present designs from the modrod website are fully modded pens that are hand painted, and carefully modded with select ring colors. One-of-a-kind original works, and the inspiration for their slogan, which is:
A work of art; built to spin.
One present con may be the location, as the pen is specially "factory-made", so you may not be able to get it in public, except through their website.
Please visit their website for more info.