The Parafernalia Falter 2D is a make-your-own-pen kit. The Falter 2D is not just a pen, it is also a ruler. The assembly kit contains a key and clear & simple instructions to assemble the pen in 4 easy steps. It is designed by Albert Ebenbichler and developed by PARAFERNALIA® in collaboration with ATOdesign. It is made entirely in Italy with the most advanced technologies, designed for those who want to have fun in the "creation" of their pen.