Uniting Design, CNC machining, and 3D Printing: The Sigma Pen is an integration of today's most advanced, and yesterday's most proven manufacturing techniques. We utilize the precision of CNC (Computer Numerical Control) machining to produce the pen's body and 6/4 titanium pocket clip. This process ensures high strength, tight tolerances, and consistent component fit, contributing to the pen's robust and reliable feel.

In parallel, we leverage the capabilities of 3D printing to fabricate intricate internal geometries and specialized parts. This technology enables the creation of designs not achievable with conventional manufacturing methods to optimize the pen's click mechanism. The combination of these approaches results in a writing instrument that exhibits both exceptional precision and reliability, designed to perform consistently through extended daily use.

"End use parts" are the holy grail of 3D printing. In recent decades 3D printing was only good enough for prototyping or temporary parts. Today's technology is up to the task and can deliver engineering-grade parts on demand. This is the only pen on earth (at the moment I'm writing this) that uses functional 3D printed parts for the click mechanism. Yes, they are plastic parts. No, plastic is not as durable as metal. However, like most things we design, the Sigma is easily repairable should the need arise. The mechanism can be swapped in less than a minute with a T8 Torx wrench.