Abandoning the cylindrical shape of a traditional pen, the Ko-Axis™ Rail Pen leverages the benefits of a flat, wide, rectangular geometry for unparalleled writing comfort and ultra-low profile carry. Rather than cramping your fingers around a thin cylindrical shaft, you can embrace your writing instrument in a more natural way that provides long term comfort with less tension on your fingers. The 4-1/2" length is optimized to deliver a fluid writing experience in your hand, yet be incredibly compact for convenient everyday carry. The magnetic twin-rail mechanism used to extend and retract the ink refill eliminates the need for a separate cap. Combined with an instant, no-tool refill replacement method, the Ko-Axis™ Rail Pen will always be your pen of choice. Its elegance, comfort, and simplicity will make you wonder why this never happened sooner. This aluminum edition is the featherweight member of the Ko-Axis™ Rail Pen family, and is coated in a hard-wearing Cerakote finish. Cerakote is a ceramic polymer based proprietary coating that offers industry leading durability, hardness, scratch resistance, corrosion resistance, flexibility, heat and chemical resistance. Key Features Flat geometry: The rectangular shape provides comfort during long writing sessions 6 mm low-profile body (less than 1/4" thick) for discrete storage when carried or clipped The perfect pen to accompany journals, notebooks, diaries, etc. The embedded micro socket provides an "Instant", no hassle refill replacement that does not require tools: pull-to-remove/push-to-insert Accepts a wide variety of commonly available D1 stylus refills, including Fisher pressurized refills (in case you want to write upside-down) Unique, twin-rail skeletonized body is strong, lightweight and will make heads turn Magnetic actuation and retention mechanism Balanced design for the ultimate writing experience No possibility of accidental ink retraction during use Flat, anti-roll design stays where you put it Symmetrical profile allows for identical writing comfort for both right and left hand usage Assembled from 24 individual, custom machined and critically selected components, to ensure a high quality, bulletproof pen that will last a lifetime What you get: Ko-Axis™ Rail Pen Integrated pocket clip Premium Monteverde D1 ink refill