Pen Uno is an all aluminum pen for the Hi-Tec C Coleto ink cartridge that also transforms into a mechanical pencil by switching two components.

Pen Uno and Pencil Uno, designed by ENSSO in Los Angeles are perhaps the most minimal writing instruments in the market. Their design aims to be elegant and discreet focusing on the details and essential components. They are machined out of space-grade aluminum anodized in five distinct colors: gold, rose gold, red, black, and space grey.

When a pen it uses the amazing Hi-Tec C Coleto gel ink cartridge, which is widely available, inexpensive and comes in a variety of colors and lineweights. As a mechanical pencil it uses regular 0.5 mm leads.

Pen Uno and Pencil Uno are currently available on Kickstarter.