Designer Jeonghwan Bae got tired of carrying around a pen, ruler and compass every time he wanted to draw perfect circles so he created the Two Points Pen. The pen combines all the functions of three essential pieces of stationary into one sleek and elegant package. As a result, all you need to do is pull out your trusty pencil anytime you need to diagram something.
The pen works with three simple components. The pen itself, a metal rod that runs the length of the pen and a pointed nub that's attached to the rod. When not in use, the nub holds the rod up by attaching to a magnet at the top of the pen. When the time comes for you to draw a circle, just detach the nub and let the rod fall.