This is more than a pen - it is a complete design tool. The stainless steel body works with both Pilot Hi-Tec-C refills AND Uni-Ball Signo DX (UM-151) refills. It also contains an integrated hobby knife (works great with X-ACTO blades), and comes in a sustainable bamboo case topped by a custom designed seven measurement ruler.
There are a few early backer slots still open to get the PHX-1 for $40 including shipping. Once those are filled, the standard backer rate for one pen including shipping is $50. Be sure to check out all of the details and video on the PHX-1 Design Tool Set Kickstarter page.