An independent design house based in Los Angeles, Inventery takes its tools seriously. How seriously? Each of these pens is precision machined from raw brass stock using a single tungsten blade. The bolt-action mechanism has been meticulously considered, too. It creates a seamless, non-hollow appearance when the trigger is clicked, and the release is a satisfying, high-speed maneuver with an audible snap. This pen is available in three sizes and three finishes, all suitable for pocket carry and outfitted with a detachable clip. The small pen is compatible with D1 refills, the medium pen takes Parker-style refills and Schmidt P8126, and the large pen accepts G2 refills and Schmidt FineLiner 6040.